A high-quality light source and the lighting environment it could create is essential to the quality of fine art during its creation as well as to the presentation and display of artworks. Both occasions require a superior lighting condition which is not only pleasant but very importantly could create an environment where true color could be easily perceived by artists and visitors. YUJILEDS has developed SunWave™(full spectrum LED)/NormLite™ lighting products and solutions for art display and art creation environments.
We see various colors in everyday life, red apples, green leaves, colorful candy. Most people take it for granted that these colors are inherent in these objects, but is this really the case?
When under the sun, you will see a red apple in a bright red. But when placing the apple in a place where there is only a blue light source, you will see a blue apple. This is because the color of the apple that people see depends on the color of the light reflected by the apple, which in fact is the remaining light the apple reflects after absorbing certain color of light from the illuminating light source. An apple looks blue under a blue light because it does not absorb any blue light and reflects them all. An apple looks black under a green light because it absorbs most green light and reflects none.
Under sunlight Under Yuji LED Under blue light Under green light
We know that a prism decomposes the sunlight into the visible light of seven basic colors of red, orange, yellow, green, cyan, blue, and purple. The reason why the apple under the sun looks red is because it absorbs colors of light other than red, and only reflects the red light remained in the illuminating light. These reflected red light enters human eye and is perceived as a red apple. When illuminating the apple with only a blue light, all the light is absorbed by the apple without any reflection, thus we see a black apple. It becomes clear that the color of certain object we see is not necessarily its original color, but actually varies greatly with the spectrum of the light source.
In the light of the basic color perception principles, the quality of the light source is very important in art creation environment. Pigment of certain color will be seen as different colors in human eyes under different light sources, thus essential for the visual quality in art creation and display. The colors an artist sees during the painting process determines what colors he/she is creating in a paintwork but these colors may not be seen the same in place for display unless the light sources in creation and display environments are quite close. Similar light spectra are important in color reproduction of artworks but light quality matters most. Mostly, human tend to believe that the original color of certain object is what it looks like under sunlight (sunlight spectrum actually). Therefore, an artificial light source that has a spectrum closer to sunlight is regarded as a higher quality light source and is supposed to create colors of artworks closer to the true colors.
The different impacts between incandescent, fluorescent and LED lamp on your painting
Now we know that high-quality light sources are very important for the creation and appreciation of artworks. What are the basic qualities that a light for artwork creation should possess? The very first and essential quality needed is the lamp’s ability to render authentic colors. We know that sunlight is the best source of light, and it has a well-balanced energy distribution in the entire visible light range 380nm-800nm. In order to quantify the color rendering ability of an artificial light source, the concept of Color Rendering Index (CRI) is defined. It evaluates the color rendering ability of the light source according to how close an object looks under an artificial illuminant to its color displayed under a sunlight. It is stipulated that the CRI of sunlight is 100, and the closer the color observed under the artificial light source is to that under the sunlight, the higher the CRI of the light source is.
The white light we used in the past, mostly fluorescent lamps, has the spectrum shown. It can be seen that the spectrum of a fluorescent lamp has a high energy output at several specific wavelengths, while most other wavelengths have a low energy output distribution. This is a source of extremely uneven energy output distribution. In recent years, LED lighting is developing rapidly. LED chips could excite phosphors to produce a smooth spectral curve. However, depending on the chip used and the phosphor, an LED emitter will have different color rendering properties.
In addition to CRI, the choice of color temperature is also very important. For a same white light source, its color of light will vary greatly depending on the color temperature as well. As the color temperature rises, the color of the white changes from warm yellow to pure white, to blueish cold white. If an artist is painting under a low color temperature, the warm yellow light makes the whole picture yellowish. In order to achieve a visual balance, the artist will probably add excessive blue pigments into the picture. Therefore, paintings drawn in such an environment, when placed in a neutral white display room, will reveal an overall blueish tone. Similarly, when viewing a neutral-toned painting in a low color temperature environment, the painting looks yellowish.
In contrast, painting under a high color temperature environment, cold white light will make the image looks blue, which leads artist adding excessive yellow pigments into the picture unconsciously and produces untrue colors. Meanwhile, when appreciating an artwork under a cool white light, you will see much blueish.
So what color temperature is best for art studio lighting? It is generally considered that 5000-6000K is a relatively neutral color temperature of whites for art creation and display. Under a light condition of such a color temperature, the deviation of color temperature in observing the color produced by the artwork can be avoided to the utmost extent. In summary, high CRI 5000-6000K light source is an ideal choice for art studio lighting.(See more "The Importance of High CRI and Best Color Temperature for Painting and Drawing")
Yuji LED can provide high color rendering lighting solutions for art studios
]]>Understanding the Basics of LED Bulbs:
Before delving into package labels, it's crucial to grasp the fundamental aspects of LED bulbs. Unlike traditional incandescent and fluorescent bulbs, LEDs (Light Emitting Diodes) use semiconductor technology to produce light, resulting in significantly lower energy consumption and longer lifespans. Normally, the LED often has more than 2,5000 hours while the fluorescent has 10,000 hours. And the incandescent, only 1000 hours.
When choosing an LED source for your home, you need to consider a few key features which are normally indicated on the package label:
The first thing to look for on the label is the type of LED bulb. There are several different types of LED bulbs, including A-shape, PAR, BR, and MR. Each type of LED bulb has different characteristics and uses. A-shape bulbs are typically used for general lighting purposes, while PAR and BR bulbs are commonly used for directional lighting. MR bulbs are used for accent lighting, such as highlighting artwork or architectural features.
LED bulbs come in various shapes and sizes, catering to different lighting needs and fixtures. Here's an introduction to some common shapes and sizes:
A19 (A60): This is one of the most common shapes, resembling a traditional incandescent bulb. It's spherical with a medium (E26/E27) base and is typically used for general lighting in lamps, ceiling fixtures, and wall sconces.
BR30: This bulb has a bulged reflector (BR) shape with a diameter of 3.75 inches. It's commonly used for floodlighting and recessed lighting indoors, especially in areas like kitchens and bathrooms.
PAR30/38: Another bulb with a parabolic aluminized reflector (PAR) shape, with a diameter of 3.75/4.75 inches. PAR38 bulbs are often used for outdoor floodlighting, security lighting, and highlighting architectural features.
Tube/T8: These bulbs have a tubular shape and are commonly used in commercial and industrial settings for overhead lighting. They come in different lengths, with the T8 size being one of the most common for LED replacements.
MR16: Typically used in track lighting, display lighting, and landscape lighting, MR16 bulbs have a multifaceted reflector (MR) shape and a diameter of 2 inches. They provide directional lighting and come in various beam angles.
Filament: These bulbs feature LED filaments arranged to mimic the look of traditional incandescent filaments. They come in various shapes like ST64, G80, and A60, offering a vintage aesthetic while providing energy-efficient lighting.
These are just a few examples, and there are many other shapes and sizes available to suit different applications and preferences in LED lighting. Make sure you have selected the proper bulb for your application. For example, if you're using a recessed lighting fixture, consider the diameter and length of the bulb to ensure it fits snugly without protruding.
For more details please check the blog: Introducing Typical Bulb Shapes and Sizes
https://store.yujiintl.com/blogs/all-about-led-lights/introducing-typical-bulb-shapes-and-sizes
Choosing the right LED bulb base is essential to ensure compatibility with your fixtures and sockets. Common fixtures include lamps, ceiling lights, track lights, recessed lights, and outdoor lighting. Some fixtures may have specific requirements or restrictions regarding the type of base they can accommodate. For example, certain track lighting systems may only accept GU10 bulbs, while some energy-efficient fixtures may require GU24 bulbs for compliance.
E26/E27: This is one of the most common base types for LED bulbs. The "E" stands for Edison screw, and the number indicates the diameter of the screw thread in millimeters (26mm for E26 and 27mm for E27). These bulbs are used in a wide range of fixtures such as lamps, ceiling lights, and wall sconces.
GU10: GU10 bulbs have a bi-pin twist and lock base. They are commonly used in track lighting, recessed lighting, and some pendant fixtures. The "GU" stands for "twist and lock" in German, and the "10" refers to the distance in millimeters between the pins.
MR16: MR16 bulbs have a bi-pin base and are commonly used in track lighting, landscape lighting, and display lighting. They are available in both low-voltage and line-voltage versions, with the low-voltage types requiring a transformer.
T8/T12: These are tube-shaped bulbs commonly used in fluorescent tube replacements. They come with either medium bi-pin bases (T8) or medium single-pin bases (T12) and are often used in commercial and industrial settings for overhead lighting.
B22/Bayonet: Commonly used in the UK and some other regions, B22 bulbs have a bayonet cap base. They are often found in ceiling fixtures, table lamps, and floor lamps.
These are just a few examples of LED bulb base types, and there are many others available to suit different fixtures and applications. Check the specifications provided by the bulb manufacturer to confirm compatibility. Pay attention to factors such as voltage requirements, socket size, and mounting mechanism.
The color temperature of the LED bulb is another important factor to consider.
Color temperature is measured in Kelvin (K) and refers to the color of the light produced by the bulb. LED bulbs with lower color temperatures (2700K-3000K) produce warm, yellowish light, while bulbs with higher color temperatures (5000K-6500K) produce cool, bluish light. The color temperature of the LED bulb can affect the mood and ambiance of a room. For example, warm light may be more suitable for cozy spaces like bedrooms or living rooms, while cool light may be more appropriate for task-oriented areas such as a kitchen or home office.
Warm White (2700K-3000K): LED bulbs with warm white CCTs emit a cozy and inviting light similar to traditional incandescent bulbs. They create a warm ambiance ideal for residential spaces like living rooms, bedrooms, and dining areas, as well as hospitality environments.
Soft White (3000K-3500K): Soft white LED bulbs offer a slightly cooler tone than warm white but still provide a comfortable and inviting glow. They are suitable for general lighting in residential and commercial settings, including bathrooms, and retail spaces.
Neutral White (3500K-4000K): Neutral white LED bulbs produce a balanced light that closely resembles natural daylight. They offer crisp and clear illumination, making them suitable for task lighting in offices, workshops, and study areas where visual accuracy is important.
Cool White (4000K-5000K): LED bulbs with cool white CCTs emit a bright and energizing light similar to daylight. They are ideal for spaces where high visibility and concentration are required, such as offices, retail stores, hospitals, and educational facilities.
Daylight (6500K): Daylight LED bulbs provide a bright and refreshing light that closely mimics natural daylight. They are often used in spaces where maximum visibility and color accuracy are critical, such as art studios, hospitals, and industrial facilities.
Tunable White: Some LED bulbs offer tunable white technology, allowing users to adjust the CCT of the light output according to their preferences or specific lighting needs. This feature is commonly found in smart lighting systems and allows for dynamic control over the ambiance of a space.
When choosing LED bulbs, consider the CCT that best complements the function and atmosphere of the intended space. Whether you prefer a warm and cozy ambiance or a bright and refreshing illumination, LED bulbs offer a wide range of CCT options to suit diverse lighting preferences and requirements.
Lumen (lm) is the unit of measurement used to quantify the total visible light output produced by a light source, regardless of its direction. The higher the lumens, the brighter the light. Use lumens as a guide to match the bulb's brightness to your specific lighting needs.
When selecting LED bulbs based on lumen output, consider the specific lighting needs and requirements of the intended application. For example, task lighting may require higher lumen output to ensure adequate visibility and clarity, while ambient or decorative lighting may benefit from softer and more subdued illumination.
LED technology offers excellent energy efficiency, allowing LED bulbs to produce high-lumen output while consuming less energy compared to traditional incandescent or fluorescent bulbs. This means that LED bulbs can deliver bright illumination while reducing electricity consumption and operating costs.
LED bulb packaging typically includes information on lumen output, providing consumers with essential details to make informed decisions when purchasing bulbs. Pay attention to lumen values and compare them across different products to choose the most suitable LED bulbs for your lighting needs.
|
LED |
Fluorescent |
Incandescent |
Lifespan |
25,000 hours |
10,000 hours |
1000 hours |
Watt |
11W(10-15W) |
20W (15-20W) |
75W |
Lumens |
1100lm |
1100lm |
1100lm |
lm/w |
100 |
55 |
15 |
In recent years, LED bulbs have become the preferred choice for energy-efficient lighting solutions. With their longevity, and diverse options, LED bulbs have revolutionized the way we illuminate our homes and businesses. In this blog, we will discuss how to read the LED light bulb label on a package box. The label contains vital information that can help you determine whether the LED bulb is the right one for your needs.
When choosing an LED source for your home, you need to consider a few key features which are normally indicated on the package label:
The Ultimate LED Bulb Buying Guide: Decoding Package Labels and Making Informed Choices1
Watt (W): Watt is a unit of power that measures the rate of energy consumption. In the context of lighting, wattage indicates the amount of electrical power consumed by a light source to produce light. It directly influences energy usage and operating costs. Historically, wattage was used as a rough indicator of brightness, with higher wattages generally corresponding to brighter lights. (However, with the advent of energy-efficient lighting technologies like LEDs, the relationship between wattage and brightness has become less direct.) Therefore, in order to be consistent with the previous habit of choosing incandescent lamps, LED bulbs are often labeled with an equivalent incandescent wattage. This helps consumers transition from traditional bulbs to LEDs more easily. For instance, a 75W-equivalent LED bulb consumes far less power(11W) while providing similar brightness(1100lm) as the 75W incandescent.
Yuji only indicates the luminous flux instead of the incandescent equivalence on the label. If you are used to incandescent lamps before and are more used to measuring the brightness of the light by wattage, then you can also find this information on the product page.
Power and wattage equivalence in lighting provide consumers with a convenient way to understand the brightness of different types of bulbs relative to traditional incandescent bulbs. By considering both wattage equivalence and actual lumen output, consumers can make informed decisions to select energy-efficient lighting solutions that meet their lighting needs while reducing energy consumption and operating costs.
6. Light Quality Parameter: CRI R9 and TM30
When evaluating the quality of light emitted by LED sources, one important parameter to consider is the Color Rendering Index (CRI). Besides, R9 and the IES TM-30-18 are still important metrics to value the light quality for some special applications.
The CRI (Color Rendering Index) is a measure of how well the LED bulb renders colors. The CRI ranges from 0 to 100, with a higher number indicating better color rendering. LED bulbs with a high CRI are ideal for areas where accurate color representation is important, such as art studios or makeup areas.
For more knowledge of CRI, please click to check the blog: What is CRI?
https://store.yujiintl.com/blogs/all-about-led-technology/what-is-cri
Under normal circumstances, most manufacturers will only mark CRI value. But if the quality of a light is measured from a more professional perspective, multidimensional test metrics must be introduced, namely: CRI R9, TM30 test report, CQS, etc. When most manufacturers are only marking CRI, Yuji's products have already provided the values of R9 and TM30. This proves our work is completed in accordance with industry-leading standards.
Specifically, CRI R9 refers to the ability of a light source to render saturated red colors accurately. While the overall CRI value provides a general indication of color accuracy, CRI R9 specifically assesses the rendering of red colors, which are critical for applications such as skin tones, textiles, and certain fruits and flowers.
The IES TM-30-18 (Technical Memorandum 30-18) is a method developed by the Illuminating Engineering Society (IES) to evaluate the color rendition of light sources using a comprehensive set of metrics beyond those provided by traditional CRI.
Unlike CRI, which can sometimes be limited in its ability to accurately assess color rendering, TM-30-18 provides a more comprehensive and accurate evaluation of color quality. It offers insights into the fidelity and saturation of colors, as well as information about hue shifts and color preferences.
TM-30-18 is increasingly being used by lighting designers, architects, and manufacturers to specify and evaluate lighting systems for a wide range of applications, including architectural lighting, retail displays, hospitality spaces, and residential environments.
7. Dimmability (Dimming Mode)
Some LED bulbs are dimmable, allowing users to adjust the brightness according to their preferences. Check the package label to ensure compatibility with dimmer switches if this feature is desired.
Types of Dimming:
Triac Dimming: Triac dimming is another type of phase-cut dimming that uses a semiconductor device called a triac to control the flow of current to the LED bulb. It offers smooth dimming performance and is commonly used in commercial and residential dimming applications.
0-10V Dimming: 0-10V dimming is a control method where a separate low-voltage control signal (0-10 volts) is used to adjust the brightness of the LED bulb. It is often used in commercial and architectural lighting systems that require precise dimming control.
PWM Dimming: Pulse-width modulation (PWM) dimming involves rapidly switching the LED bulb on and off at varying frequencies to control the average light output. This dimming method is commonly used in LED lighting systems with digital or smart dimming capabilities.
Not all LED bulbs are compatible with all dimmer switches or control systems. It's essential to choose LED bulbs that are specifically labeled as dimmable and compatible with the dimming method used in your lighting setup.
In summary, LED bulb dimming mode provides users with flexible control over lighting levels, energy savings, and ambiance enhancement. By understanding the types of dimming methods, compatibility considerations, and benefits of dimmable LED bulbs, users can optimize their lighting experience to suit their needs and preferences.
8. Beam Angle
The beam angle indicates how wide the light is distributed. A narrower beam angle concentrates light in a smaller area to suitable for focused lighting, while a wider beam angle disperses light over a larger area and is ideal for general illumination.
Narrow Beam Angle (15-30 degrees): Narrow beam angles provide focused and directional light, making them ideal for accent lighting, spotlighting, and task-oriented applications where precision illumination is required.
Medium Beam Angle (30-60 degrees): Medium beam angles offer a balance between focused and wide dispersion of light. They are suitable for general lighting in residential and commercial settings, as well as for accentuating specific areas or objects.
Wide Beam Angle (60+ degrees): Wide beam angles provide broad and uniform illumination over larger areas. They are commonly used for ambient lighting, wall washing, and floodlighting applications where even distribution of light is desired.
9. Lifespan and Warranty
LED bulbs are known for their longevity. Package labels often display the estimated lifespan in hours. Look for bulbs with high-quality components and reliable warranties to ensure durability and peace of mind.
10. Specific Features and Functions
Explore additional features and functions offered by LED bulbs, such as Flicker-free,full spectrum,smart lighting capabilities, color-changing options, and compatibility with home automation systems. These features can enhance convenience, versatility, and customization in your lighting setup.
Armed with the knowledge of how to read an LED bulb package label, consumers can confidently navigate the vast array of options available in the market. By considering factors such as bulb shape, base type, color temperature, lumens, light quality parameters, dimmability, beam angle, lifespan, and additional features, you can make informed decisions and create the perfect lighting environment for your home or business.
]]>First, when considering what type of light to paint in, we need to understand that CRI and color temperature how play an important role in the artwork lighting.
A color rendering index (CRI) is a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully in comparison with a natural or standard light source.
Color rendering, as defined by the International Commission on Illumination (CIE), is the effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a reference or standard illuminant.
Light sources with a high CRI are used widely in color-critical applications such as printing and paint shops, film & photography areas, art studios, jewelry appraisal center detects and art restoration.
For an art studio, we can think of the CRI value of an indoor light source can be seen as a measure of how closely an object's color appears to natural daylight outside. CRI has a maximum score of 100. The more a light source gets closer to 100, the more it shows the realistic and true colors of an object.
As an artist, you need to ensure that the colors in your canvas are consistent with how they appear under natural or standard light sources. The higher the CRI, the closer the color of the item is to the true color under natural light or standard light sources.
From Wikipedia, the correlated color temperature (CCT) is defined as "the temperature of the Planckian radiator whose perceived color most closely resembles that of a given stimulus at the same brightness and under specified viewing conditions.
To put it simply, CCT stands for Correlated Color Temperature, which is a way to describe the color appearance of a white LED light. It is measured in degrees of Kelvin (K) on a scale that ranges from 1000K to 10000K.
Different temperatures on the Kelvin scale represent different colors. For example, light at 1800K-3200K looks more orange/yellow and is called warm white, and as temperature increases in Kelvins, color changes to more of a “paper white” known as natural or neutral white (between 4000K and 5000K) and finally becomes a bluish white known as cool white (5600K-6500K).
Warm white (1800K-3200K) creates a warm and comfortable area. It is generally used in rooms where everyone gathers to visit or relax (living rooms, bedrooms, dining rooms, etc.).
Neutral or natural White (4000K-5000K) creates a natural daylight effect. This is the best-selling strip as it mimics natural light and can be used comfortably anywhere in the home, especially in your workplace.
Cool white (5600K-6500K) casts a bright and fresh glow. Cool white is great for task lighting as it is a brighter and more focused light. The cool bright colors are used the most in bathrooms, kitchens, and workspaces.
The choice of color temperature (CCT) for the lighting in an art studio is a matter of personal preference for the artist. This is because every artist perceives color and light differently.
Also, they typically use natural light to create art. Natural sunlight is the best source of lighting for art and provides the most accurate color rendition. But for some studios without access to natural light, a color temperature of 5000K is usually the best option for most people.
In terms of feeling, this provides a slightly cool and clean light source, allowing for warm painting tones while maintaining true colors.
In terms of technically, the D50/5000K is also the best option for an art studio.
In conclusion, color temperature (CCT) and CRI are two different indicators for LED lights. For art studios that require high-quality color reproduction, YUJILEDS recommends that you choose art studio lighting that have the following two characteristics:
1.Correct color temperature (daylight - 5000K/D50 or 6500K/D65)
2.CRI rating is 95 or higher, R9 should also be 90+ (Click it to see more about why R9 is important)
If you want to upgrade or renovate your art studio after reading this blog, then you can consider using YUJI products to give your space a refreshing feel.
1. One of the easiest things you can do to improve your lighting quality is to modify the floor lamp, desk lamp or clip-on desk lamp that you are currently using. All you need to do is replace the bulb with a NormLite™ CRI 98 A60 E27 5000K bulb. This will significantly enhance your color performance in your art creation with minimal effort and time.
Standard Illuminant CRI 98 D50 5000K T8 LED Tube which offers the high color rendering index (Ra 97+) and low metamerism indices in both visible and ultraviolet range. These tubes could create an ideal viewing condition in compliant with ISO3664: 2000 standard. Energy use will be reduced by over 30%.
Last, whether you are a beginner, amateur, or professional artist, natural light is undoubtedly the best source of light to create works of art. For art studios without windows, YUJI recommends using LED products that can accurately reproduce colors (high CRI) under a more neutral white light color (5000k). This will enable you to perform at your best when creating your art.
]]>To achieve color consistency, LED technology has been adopted, which is known for its ability to provide reliable color consistency over time and across batches of light fixtures. Additionally, color tuning systems are designed to maintain consistent color temperature and CRI under various conditions, including temperature and power fluctuations.
Color consistency is critical in many fields, such as graphic design, printing, textiles, and especially in the lighting industry. In terms of lighting, color consistency refers to making sure that the color appearance of the light remains the same across all products over time to create a uniform look. Here are some examples of why color consistency is so important:
Consistency in color is a vital part of achieving aesthetic, design goals, and product quality. The lighting industry, in particular, relies heavily on color consistency for creating an ambient atmosphere that enhances human experience. Any improvement in the technology and methods used for color consistency will help produce high-quality products that produce desired outcomes.
MacAdam ellipse is a concept used in colorimetry and lighting design to describe the extent to which a color can vary and still be considered the same by the human eye. The concept was developed by David Lewis MacAdam in the 1940s, and it has become an essential tool in the field of lighting and color science.
The MacAdam ellipse is an elongated oval shape that represents the range of color variation that a human observer can tolerate without noticing the difference. In other words, the ellipse is used to define a color tolerance range. The major axis of the ellipse is referred to as the Just Noticeable Difference (JND) axis, and it indicates the range of hue variation that the human eye can distinguish. The minor axis of the ellipse represents the chromaticity variation.
Each ellipse is defined by an area that is enclosed by a specific number of standard deviations, typically 1, 2, 3, 4, or 5. The smaller the number of standard deviations, the smaller the area enclosed by the ellipse, indicating a more restrictive level of color tolerance. For example, a MacAdam ellipse of 1 SD means that all colors within that ellipse will be indistinguishable from the reference color by 68% of observers, while those outside the ellipse will be noticeably different. Similarly, an ellipse of 2 SD means that 95% of observers will not notice any difference between the colors within the ellipse, etc.
The MacAdam ellipse concept is particularly useful in the lighting industry, where color consistency is a crucial consideration. For example, in a large-scale lighting installation where multiple light sources are used, using identical color temperature or color rendering is challenging due to the inherent variations in manufacturing and environmental conditions. MacAdam ellipses help lighting designers achieve consistent color by specifying the maximum acceptable color deviation.
MacAdam ellipses provide a quantitative method of specifying acceptable color deviations from a desired reference point. This method allows for consistent color in lighting applications that require color uniformity, such as retail environments or art galleries. By using MacAdam ellipses, lighting designers and manufacturers can produce more precise, accurate, and consistent lighting systems that meet industry standards and satisfy customer expectations.
LED binning is a process used during LED manufacturing to sort LEDs with similar electrical and optical characteristics into groups or bins. The process involves testing and grouping LEDs with similar light output, color temperature, and other electrical properties into different bins or categories. This is usually done to ensure consistent color and brightness across a lighting installation or product line.
The LED binning process typically involves several tests, including a forward voltage test, a luminous flux test, and a chromaticity test. Once the LEDs have been sorted into the appropriate bins, they are matched to the desired specifications, such as color temperature, luminous flux, and current rating, to ensure consistently uniform performance.
LED binning is essential in the LED lighting industry because LEDs can differ significantly in color and brightness, even between the same batch in the same production run. By binning LEDs, manufacturers can ensure that the LEDs they use in their products have consistent characteristics and thus provide consistent performance and light quality, ensuring the customer receives the color-accurate, and consistent lighting result they expect.
The binning process typically results in an increase in the cost of producing LED lighting products because manufacturers must purchase and use more LEDs to ensure the required consistency. The binning groups are usually expressed as a number, such as S1, S2, S3, and so on, with S1 being the bin with the best quality (i.e., the most consistent LED performance). The higher the rating of the bin, the smaller the deviation or differences between the different LEDs in that bin.
In summary, LED binning is the process of sorting LEDs into groups based on their electrical and optical characteristics. This process is essential for ensuring that LED lighting products have consistent performance, light quality, and color accuracy, and it is essential in many applications that require precise and consistent lighting, such as photography, film lighting, and indoor and outdoor lighting installations.
It’s important to remember that color accuracy and consistency are not just theoretical concepts. In fact, they derive from the light spectrum.
As we can notice, general LEDs usually get 25% deviation in time which is the primary reason causing color shift and inconformity, but with Yujileds® spectral grade regulation we are able to achieve only 5% deviation.
Behind the spectral grade regulation is our elaborative control of the raw materials to reach up to 2.5nm tolerance binning, which determines the absolute accuracy and consistency that distinguishes our products.
We propose the innovative Yujileds® SimpleBinning solution when most LED manufacturers are providing complex binning systems. The optional bins are limited between 1-2 sections without compromising the color quality, which greatly simplifies the lighting design.
Yujileds® SimpleBinning provides statistically consistent color performance and with Yujileds® module the performance can reach 1-2 step equivalent SDCM.
What is it TrueChroma Service?
The Yujileds® TrueChroma Service is a service provided by Yujileds for a wide range of LED products. It’s the tracing and analysing support of every batch of LED production and the database saving data for a lifetime.Thanks to these data we can track the specific raw material information directly to that batch. This service is particularly important and desired for high-end requirements and high-value-added exact applications and is also significant for long-term business development and cooperation.
Up to 0.0015 (CIE x,y) tolerance certification
We take the lead to provide up to 0.0015 (CIE x,y) chromaticity tolerance (based on Yuji condition) as the specification when other LED manufacturers are still offering 0.006.
We all along consider the 0.006 tolerance meaningless except for liability exemption since it is getting close the 5-step SDCM with obvious visual color difference. The industrial LED production generates tolerance indeed but the nominal 0.006 is not helpful to resolve the evaluation of tolerance then the real chromaticity parameters.
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Now that you're acquainted with our Sunlight Technology, let's explore how it manifests in the Mission 02 Full Spectrum 98 CRI Floor Lamp 4000K.
Full Spectrum Brilliance: The Mission 02 is designed to bring out the true colors of your surroundings with a CRI of 98. This means that every object, painting, or document illuminated by this lamp appears as vivid and lifelike as if it were bathed in natural sunlight. Say farewell to the flat, unnatural colors of conventional lighting.
Impressive Luminosity: With a staggering 6000 lumens of brightness, the Mission 02 provides an abundance of light, perfect for tasks that demand precision and focus. Whether you're poring over reports, sketching your next masterpiece, or reading a complex textbook, this lamp ensures that your workspace is brilliantly illuminated.
4000K Color Temperature: The 4000K color temperature strikes a perfect balance between warm and cool lighting. It provides a pleasant and invigorating atmosphere, making it suitable for various settings. Whether you're working in your home office, relaxing with a book, or showcasing your artwork, the Mission 02's 4000K lighting ensures a versatile and comfortable ambiance.
Adjustable for Your Needs: We understand that lighting requirements can vary greatly. The Mission 02 is allowing you to smoothly dimming the light precisely to what you need. Minimize glare, definitely flicker- free, reduce eye strain, and optimize your workspace for maximum productivity and comfort.
Smart Sensor Modes:
Motion sensor mode: The lamp will automatically turn on when a human approaching is detected and turn off automatically after an 8-minute dimmed light in the absence of humans.
Energy-Efficient and Eco-Friendly: We're passionate about sustainability. The Mission 02 embodies this commitment with its energy-efficient LED light source and long lifespan. Not only will you save on energy bills, but you'll also reduce your carbon footprint, contributing to a greener future.
Experience the future of lighting with the Mission 02 Floor Lamp by YujiLEDs. Whether you're seeking to enhance your workspace, create an inviting reading nook, or simply elevate your interior design, this lamp is the ideal choice.Don't miss out on the opportunity to own a lighting masterpiece. Click here to explore the Mission 02 and place your order today. Illuminate your world with excellence, one LED at a time!
]]>Light does not only bring a visual effect to our days for our eyes; it also biologically regulates the physiological response of our bodies by affecting the secretion of melanopsin which, in turn, directly determines our circadian rhythm (natural and internal process that regulates the sleep–wake cycle and repeats roughly every 24 hours) and thus our mental and physical health. In this blog, we'll introduce you to these revolutionary LED bulbs: the future of new concept illumination with the Well24 Day & Nite A60 LED Bulb by Yuji International.
At Yuji International, we've always believed that lighting should be an experience that enhances your life. That's why we've poured our expertise and passion into creating the Well24 Series A60 Bulbs. Let's explore why these bulbs are a game-changer.
Discover the Key Benefits of Yuji Lighting Well24™ Science:
1. Enhance Concentration:
Stimulate mental alertness and physical activity with the Well24™ Day series utilizing
melanopsin secretion restraint.
2. Create Relaxation:
Ease seamlessly
into sleep with the Well24™ Nite series, fostering melanopsin secretion
promotion for tranquil relaxation.
3. High CRI (up to 95): Revel in visually comfortable
surroundings with vivid colors and an enhanced lighting experience in
relaxation spaces.
4. Optimized M-DER and M/P ratio*: Save on lighting costs
while maintaining a harmonious balance of circadian effects with carefully
engineered parameters for both Well24™ series.
5. Effortlessly Blend Familiar Light with Powerful
Biological Effects
Designed to align with industry standards and indoor lighting habits, Well24™ offers a
seamless, comfortable, and familiar lighting experience that does not
compromise on its transformative biological impact.
After a year of theoretical verification, technology research and development, and product experiments, we and SAGA are extremely excited to announce the official landing of the International Space Station lighting project “Space Lamp”, and this summer with SpaceX’s Crew Dragon stationed on the International Space Station, and fully participate in many topics that study the relationship between the space lighting environment and human health.
For a more in-depth technical understanding of Circadian Rhythm Lighting and the Well24 Day & Nite A60 LED Bulbs, visit Yuji International's detailed page here: Circadian Rhythm Lighting.
In conclusion, lighting is no longer just about illumination; it's about enhancing your well-being and productivity. Embrace the future of lighting with the Well24 Day & Nite A60 LED Bulbs by Yuji International. Experience the difference, and let these advanced LED bulbs transform your living space.
Elevate your lighting experience with the Well24 Series A60 Bulbs. Shop now at Yuji International's High CRI Webstore, and discover a brighter, more vibrant future.
M/P ratio is Melanopic/Photopic ratio, it quantifies the effect of light on circadian rhythm. Basically, a higher the M/P ratio of a light source will promotes alertness and wakefulness. While a lower M/P ratio of a light source is best suited for nighttime relaxation and preparation for sleep.
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Spectral Technology:
At the heart of the Yuji Serenity Sleep Lamp is its advanced spectral technology, designed to mimic the natural biorhythms of daylight and candle flame-warm light. The high Color Rendering Index (CRI) of 98 ensures that the light emitted closely resembles natural sunlight and the low Melanopic/Photopic (M/P) ratio of 0.099 bring you to the super warm of traditional candle light, promoting a calming and comfortable environment for relaxation. The lamp's spectrum is carefully tuned to harness the soothing wavelengths conducive to sleepiness, making it an effective tool for pre-sleep rituals.
Cultivating Pre-Sleep Relaxation:
The Yuji Serenity Sleep Lamp proves to be an excellent companion for winding down before bedtime. Its warm and gentle glow is specifically designed to cultivate a serene atmosphere, signaling to the body that it's time to prepare for sleep. This pre-sleep function aligns with the natural circadian rhythms, helping users transition from the stimulating brightness of the day to the subdued ambiance needed for a restful night. It is an excellent tool for those seeking a peaceful transition from wakefulness to slumber.
Enhancing Quality Sleep:
Beyond its role in pre-sleep rituals, the Yuji Serenity Sleep Lamp continues to work its magic after you've fallen asleep. Leaving the lamp on during the night provides a subtle and non-disruptive source of light. This feature proves invaluable for individuals who may experience discomfort or unease when faced with complete darkness. The subtle, low-intensity light minimizes disturbances, making it easier for individuals to maintain a deep sleep state. This feature is particularly valuable for those who may experience nighttime awakenings or disruptions.
Thoughtful Product Design and User-Friendly Features:
The 3-in-1 nature of the lamp caters to various needs, offering settings for night reading, pre-sleep relaxation, and overall well-being. With user-friendly controls and adjustable brightness levels, customization is at your fingertips, ensuring a personalized and comfortable sleep environment.
The M/P Ratio is a metric used to evaluate the impact of light on the melanopsin receptors in the human eye, which are responsible for non-visual responses like circadian rhythm regulation. It's a measure of the effectiveness of light in influencing these non-visual responses.
CRI, on the other hand, primarily assesses the color quality of light in terms of its ability to render colors accurately compared to natural light. It is scored on a scale of 0 to 100, with higher values indicating better color rendering. High CRI light sources are designed to mimic natural sunlight, ensuring that colors appear vivid and true to life.
1. High CRI: Seeing True Colors
Benefits of High CRI:
Accurate Color Representation: High CRI lighting ensures that objects appear as they would under natural sunlight, allowing for accurate color perception.
Enhanced Visual Comfort: Spaces illuminated with high-CRI lighting tend to be more visually comfortable, reducing eye strain and fatigue.
Improved Aesthetics: High-CRI lighting enhances the aesthetics of spaces by showcasing colors in their full vibrancy.
The primary objective of high CRI lighting is to faithfully represent colors, mimicking natural sunlight. This is especially crucial in environments where accurate color perception is essential, such as art galleries, retail spaces, or photography studios. High CRI lighting sources typically provide a broad spectrum of light, ensuring that colors appear vivid and true to life. Thus, it enhances the visual experience, allowing people to perceive colors in their truest form, with minimal distortion or color shifts.
2. Low M/P Ratio: Prioritizing Circadian Health
Low M/P Ratio lighting is designed to prioritize circadian health by minimizing the impact of blue light on the body's natural sleep-wake cycle. This is particularly important in settings where maintaining a healthy circadian rhythm is critical, like healthcare facilities, offices, and residential spaces.
Benefits of Low M/P Ratio:
Circadian Health Support: Low M/P Ratio lighting is designed to align with the body's natural circadian rhythm, promoting better sleep and overall well-being.
Reduced Blue Light Exposure: By minimizing the proportion of short-wavelength blue light, low M/P Ratio lighting helps mitigate the potential negative effects of blue light on sleep quality.
3. High M/P Ratio: Enhance Visual Perception
High M/P Ratio refers to a lighting source that emits a relatively higher proportion of short-wavelength (blue) light compared to the overall illuminance. The M/P Ratio is a metric that specifically considers the impact of light on the circadian system, influencing the body's natural sleep-wake cycle.
A higher M/P Ratio suggests a greater influence of light on circadian rhythm and, in practical terms, indicates a lighting environment that is more stimulating to the circadian system.
In general, we will use another concept to measure the awakening effect of this lamp. Just like we use the M/P ratio to go to choice the relaxed effect ones.
High Melanopic Daylight Efficacy Ratio:
Melanopic Daylight Efficacy Ratio (M-DER) is a metric for evaluating the circadian effect compared to the natural daylight (6500K), when M-DER = 1, the circadian effect of the light is equivalent to the daylight.
A high Melanopic Daylight Efficacy Ratio suggests that daylight is effective in influencing the circadian system. This can be important in architectural and lighting design to create environments that support human well-being and health.
Both concepts are linked to the spectral characteristics of light and their impact on human physiology, particularly the circadian system. A high M/P ratio or a high Melanopic Daylight Efficacy Ratio implies that the light source is more effective in influencing circadian rhythms.
Here are a few key points about high M-DER Ratio light:
Circadian Stimulation: High M-DER Ratio light is designed to provide a strong signal to the circadian system. This can be beneficial during the daytime when exposure to blue-rich light helps promote alertness, focus, and regulate the sleep-wake cycle.
Daytime Applications: Lighting sources with a high M-DER Ratio are often used in environments where promoting wakefulness and alertness is desired during daylight hours. This includes workplaces, schools, and other settings where maintaining a high level of attention and performance is important.
Impact on Sleep: Some lighting systems are designed to dynamically adjust the M/P Ratio based on the time of day. For example, the lighting might have a high M/P Ratio during the morning and afternoon to support alertness and productivity, and then transition to a lower M/P Ratio in the evening to promote a more relaxing and circadian-friendly environment.
The debate between High CRI and Low M/P Ratio is not about choosing one over the other; it's about understanding the specific needs of the environment and its occupants. A thoughtful combination of these lighting metrics can lead to spaces that are both visually stunning and supportive of human health and well-being. As technology continues to advance, the future of lighting design lies in creating solutions that seamlessly merge aesthetics with functionality, striking the perfect balance between form and function.
]]>In the past, we used watts to gauge the brightness of a bulb. However, with the advent of energy-efficient LED technology, watts are no longer an accurate measure of brightness. Instead, we use lumens, which measure the actual amount of visible light emitted by a bulb. In short, lumens tell you how bright a bulb is, while watts tell you how much energy it consumes.
Lumens (Brightness) |
Equivalent Incandescent Bulb (Watts) |
Equivalent LED Bulb (Watts) |
200 - 300 |
25 |
3 - 5 |
400 - 500 |
40 |
6 - 8 |
600 - 800 |
60 |
9 - 13 |
800 - 1100 |
75 |
10 - 18 |
1100 - 1600 |
100 |
19 - 22 |
1600 - 2600 |
150 |
20 - 30 |
2600 - 3200 |
200 |
31 - 40 |
This chart is a useful starting point, but keep in mind that LED technology varies between manufacturers and bulb types. Some LED bulbs may provide the same amount of lumens with even lower wattage, further saving energy.
YUJI Product |
Lumen |
Watt |
Floor Lamp |
3000lm indirect & 3000lm direct |
35W indirect & 35W direct |
A60 Dimmable Bulb |
1100lm |
11W |
SunWave PAR30 Bulb |
1800lm |
20W |
While the lumens to watts conversion chart is helpful, it's essential to consider the specific room and purpose of the lighting. Different areas may require different levels of brightness. Here are some factors to keep in mind:
Task Lighting: For areas where you need focused and bright light, such as a kitchen or workspace, opt for higher lumens. Task lighting often requires bulbs in the 800-1100 lumens range or higher.
Ambient Lighting: For creating a cozy and relaxed atmosphere in living rooms or bedrooms, choose bulbs with fewer lumens, typically in the 400-800 range.
Outdoor Lighting: When illuminating outdoor spaces, consider the desired brightness level based on safety and aesthetics. Pathway lighting may require fewer lumens than security lighting, for example.
Dimmable LEDs: If you want to adjust the light level in a room, consider dimmable LED bulbs. They provide flexibility by allowing you to change the brightness to suit different activities.
Understanding lumens and watts and how they relate to LED bulbs is crucial for choosing the right lighting for your space. By referring to the lumens to watts conversion chart and considering the room's purpose, you can strike the perfect balance between energy efficiency and adequate illumination. LED technology has made it easier than ever to brighten your life while saving money and reducing your carbon footprint. So, next time you're shopping for bulbs, remember to focus on lumens for brightness and choose LEDs to light up your world efficiently and effectively.
]]>The level of brightness in your dining room can affect the mood and ambiance of your space. Dimmer switches are a great way to control the brightness of your lighting and can be adjusted according to the occasion.
No matter what type of lighting you choose for your dining room, it’s important to install dimmer switches. Dimmer switches allow you to adjust the level of light in the room, creating the perfect ambiance for any occasion. They are also great for setting the mood during dinner parties or romantic evenings at home.
When choosing bulbs for your dining room lighting, it’s important to consider both the type of bulb and the color temperature. Incandescent bulbs are the traditional choice for dining room lighting, but they are not very energy efficient. LED bulbs are a great alternative, as they are more energy efficient and last longer than incandescent bulbs. When it comes to color temperature, it’s best to choose a warm white bulb (around 2700K) for a cozy, inviting feel.
A LED bulb with high CRI should be a better choice for enhancing the food color into inviting.Dining Room Lighting: Creating the Perfect Ambiance for Your Space
In conclusion, choosing the right lighting for your dining room can significantly enhance the ambiance of your space. Consider the size of your room, the style, ceiling height, level of brightness, and function of your dining room when selecting your lighting fixtures. With these tips in mind, you can create a beautiful and functional dining room lighting design that meets your needs and personal style.
The prerequisite for the layout of lamps in the children's room is that all the lights should not shine directly into the children's eyes, after all, the children are in the stage of visual development. So, the simple design philosophy is using different lights according to different occasions.
]]>The prerequisite for the layout of lamps in the children's room is that all the lights should not shine directly into the children's eyes, after all, the children are in the stage of visual development. So, the simple design philosophy is using different lights according to different occasions. In addition, it is not recommended to install floor lamps in children's rooms. When children run and jump, they easily trip over wires and be crushed by overturned floor lamps.
So be careful when designing and arranging lights. Here are some tips:
Using exposed bulbs without a lampshade is not safe. Children may directly touch the light bulb which will easy to cause electric shock or burns. Furthermore, the lamp will be too dazzling and it is recommended to choose a light shade to block and filter the strong light. To some extent, LED light covers also can help by blocking some of the blue light from the LED bulbs.We can low-voltage light strips as well.
Direct high-intensity light can cause blindness in the baby's eyes.
If the angle of the spotlight is not well grasped, the light from the spotlight may reflect directly on the retina of the child, which will damage the child's vision and may also cause the child's mental stress.
If you want to use spotlights to illuminate artwork on the wall (such as picture frames), avoid creating harsh highlights. Therefore, when lighting, it is necessary to shoot at the artwork from the side. Light comes from the side so that the harsh highlights will not reflect directly on the eyes of the people.
It is not suitable to set lamps directly above the head of the bed, whether it is the main lamp or floor lamp, wall lamp, or spotlight.
Children's eyesight is very fragile and can't handle direct light although the lamp on the bed can give more light to the bed. The safe design is to ensure that the child cannot see the lamp head while lying in bed.
Children will finish reading and doing homework on the desk. Therefore, it is necessary to place a lamp onto the secretaire.
Children may play and read in any corner of the room. Make sure that the basic lighting can provide the room with uniform, sufficient illumination, and choose a full spectrum reading and writing desk lamp on the desk so that children can stay focused and feel comfortable while studying.
When placing children's artistic creations or memorable collections, small spotlights or light strips can be added appropriately to make them better displayed.
Motion sensor night light can be added under the bed or on the wall to avoid stimulating children's eyes with sudden bright light so that children can sleep independently and get up at night more securely.
In terms of materials, it is necessary to choose safe, non-toxic, and harmless lamps, so as to create a healthy space for children.
When we design the baby room, we should pay attention to the lighting arrangement to give the baby a healthy living environment. An excellent children's room lighting design can bring great benefits to children's body and mind.
If you have any further questions regarding choosing lights for your kids’ room, please no hesitate to contact us for suggestions.
]]>Yuji SunWave™ series delivers closest-to-sunlight natural light with 99% similarity, rendering colors as true as under sunlight. It contains violet light, weakens blue light, and enhances red light to help create a healthy environment for the eye.
]]>Natural light is actually the healthiest and most enjoyable light. A room with opulent sunshine and fresh air should be a good choice for kids’ rooms. Windows and curtains should be opened during the day to let sunlight into the room as much as possible and make the room ventilated. But be aware that the light should not directly shine into the baby's eyes. At the same time, when using artificial light, we should strive for a high-quality light source.
Yuji SunWave™ series delivers closest-to-sunlight natural light with 99% similarity, rendering colors as true as under sunlight. It contains violet light, weakens blue light, and enhances red light to help create a healthy environment for the eye.
Now let's take a look at the lighting design of the children's rooms. What do we need to pay attention to?There are many kinds of lamps, which can be divided into basic lighting, atmosphere lighting and functional lighting according to their functions. The lamps suitable for children's rooms should be based on basic lighting, supplemented by atmosphere lighting and functional lighting. Ceiling lamp, table lamp, reading lamp, wall lamp, lamp strip can be used in combination.
Children's eyes are relatively more sensitive, too bright light, or too dim light will damage the development of eyeballs and affect their vision. Therefore, the color temperature and brightness of the lamps in kids’ rooms are very particular.
There has been a doctor who said that too dark a surround can do great damage to the eyes, so the design of the baby’s room should have sufficient light. However, too much light will also affect the health of the baby's eyeballs, and it is also very easy to cause irreversible damage to the eyeballs. The baby's eyes are not yet fully developed, and high-intensity direct light can cause blindness. Therefore, the selected lamps should be adequate but not strong.
It is best to choose a lamp that can adjust the brightness and angle, ensure enough light when reading during the day, and dim the light at night to increase the child's sense of security and help the child fall asleep as soon as possible. After the child falls asleep, be sure to turn off the light. Because children sleep under lights, their eyesight will be impaired, and the rate of myopia is much higher than that of children who sleep in the dark. Moreover, the light will inhibit the secretion of melatonin in the human body or reduce its concentration, causing problems such as insomnia and poor sleep quality, which will adversely affect the growth and development of children.
Light strips with soft light can also be used in the baby’s room. The brightness should be as soft as possible. Do not choose colorful or too bright light belt products. Don't choose colorful tapes in various shapes, as they will cause eye fatigue and blurred vision, which will affect the health of your baby's eyesight.
SunWave™ series is the ideal option wherever eye health is your concern and natural light is needed. At the same time, the dimmable LED bulbs with smooth dimming down to 5% offer you the most flexibility to control the brightness in your place without any flickering. Please check Yuji SunWave™ bulbs below:
The first two years after birth is a critical stage for the development of the baby's eyes and eye focal length adjustment function. When designing the baby room, parents should take it seriously that the lamps at home should be equipped with lampshades as much as possible. The baby should not be allowed to look at the sun when going out. Do not turn on the bathroom heat lamp fixture when bathing the baby. The light from the fixture can seriously damage the baby's eyes.
Children's eyes are in the developing stage and are extremely sensitive to light. If the lighting design of the room is unreasonable, with problems such as strong light, glare, and flicker, it is very likely to have adverse effects on their vision and even their physical and mental health. In response to these problems, Yuji products have carried out technical innovations one by one. The problem of glare and strobe is avoided, so you can use it with confidence.
SunWave™ Family Features
In addition, the color temperature of the children's room is recommended to choose 3000K-4000K, which is soft and comfortable.
Generally speaking, the lighting layout of a children's room should be based on the main light, with ambient and functional lights as auxiliaries. The color temperature of the main light should be controlled within 4000-6000K, which can not only meet the lighting needs of children, but also not too dazzling. Before sleep, the auxiliary lighting should be based on soft lighting, controlled below 3000K. When children are doing homework and reading, both the desk lamp and the main lamp should be on at the same time, which is controlled at about 4000K.
Yuji dim to warm led strip, 1800K-3000K dimmable, adjusting the brightness as well as the color temperature at the same time.
CRI-MAX™ CRI 95+ DIM TO WARM LED FLEXIBLE STRIP 1800K-3000K - HUMAN CENTRIC LIGHTING
Yuji SunWave™ CRI 98 Tunable White LED Flexible Strip 2700K-6500K meet varies lighting scenario of kids, such as learning, playing and falling asleep. For example, before going to bed, the whole room can be darkened in advance to help children gradually adapt to the darkness and reduce inner fear.
In addition to choosing the right lamps, it is also important to use them intelligently. We'll talk more about this in the next article.
]]>Check the packaging: As mentioned above, it is a way to distinguish the quality by looking at the details of the packaging. Take the products of Yuji lighting as an example, the hard corrugated paper box is used, and the design is simple and generous. The UV process is used to highlight the front lamp body and important parameters, and the silver pressing process is used for the decorative pattern to make the pattern look three-dimensional.
Check the appearance and process details of the product. The radiator has better quality without obvious injection marks, which indicates that the process level of the manufacturer is qualified.
Check the weight of the product, the product with better quality will be heavier. Although this is not a very scientific and reliable method, it is indeed a very simple and effective method.
Because generally speaking, the driving function of more components is more powerful and reliable. A larger radiator will bring more heat dissipation capacity, and of course, these will also bring more weight.
The weight of A60 10W of Yuji lighting reaches 91.7g, while the average quality product is only about 44.4g.
Yujilighting General quality products
If you have the opportunity to turn on the LED A60 Bulb, you can see the internal structure.
Check whether the bulb shell is fully fixed. The more difficult the bulb shell is to open, the better the quality of the LED A60 bulb. Good bulb shell fixation can provide more reliable torsion, so that the lamp will not fall off when it is screwed and disassembled on the lamp holder.
The LED A60 bulb with 3030 package LED component has better photoelectric parameters and reliability performance than which LED A60 bulb with 2835 package component.
The more components on the drive, the larger the size of each component, and the more reliable the lamp is.
Yujilighting General quality products
Check the contact area between the LED substrate and the lamp board. This determines whether the temperature transmission channel is smooth and fast. The larger the contact area, the more effective and rapid the temperature transfer, and the better the quality of the lamp.
It can be seen from the picture that the aluminum substrate of Yuji lighting products has a large contact surface with the lamp plate, while the aluminum substrate of general quality products has little contact with the lamp plate.
Yujilighting General quality products
When you have some simple equipment, you can judge the quality of LED bulbs more intuitively and effectively. Such as power meter, mobile phone, etc.
1. Use a power meter to compare the power difference between the cold state of the same product just lit and the thermal stability time (about 1-2h lighting). The greater the power difference, the less guaranteed the product quality.
Taking Yuji 10W LED A60/A19 as an example, the difference between cold and hot power is in the range of 0.5 ~ 0.8W, which represents that the stability of the product is very good.
If the power difference is greater than 1W, or even up to 2W, the quality of this lamp is very poor. The reason is simple. The larger the power difference, the worse the heat dissipation, resulting in great changes in the driving and led working parameters.
2. Set the smart phone to the slow motion recording function, adjusting the frequency and clarity to the maximum (4K 240 frames), and make the camera as close as possible to the LED light. If the picture of the mobile phone is very stable and no flicker or dark lines are found rolling, then the LED bulb may be stroboscopic. On the contrary, it indicates that the light bulb has stroboscopic, and the quality is very ordinary. For the products of Yuji lighting, the luminous flux output is constant, the flicker frequency is 66666.7hz, which belongs to the high-frequency exemption frequency, the stroboscopic percentage is 5.3%, and the stroboscopic index is 0.013.
For general quality products, the luminous flux output is not constant, the flicker frequency is 120Hz (the flicker is not controlled, and the flicker frequency is grid frequency * 2), the flicker percentage is 6.8%, and the flicker index is 0.017
General quality products
Evaluation institutions or manufacturers often have professional equipment, such as driving performance analyzer, multi-channel temperature inspection instrument, integrating sphere photoelectric test system, etc.
3. Stability of driving output: Use the driving performance analyzer to input ± 150% rated voltage to the bulb and observe the change of driving parameters.
The more the parameter changes, the better the product quality. The greater the change of parameters, it means that the power or other parameters of LED bulbs will change with the fluctuation of power grid, which brings great potential quality problems.
The parameters of Yuji lighting products are stable under different voltage inputs. And the product parameters with poor quality will change with the change of voltage.
General quality products
4. Monitor the temperature of LED and driving important components: Use the test line of multi-channel temperature patrol instrument (usually 16 or 32 thermocouple test lines) to detect the temperature of LED and driving important components. The higher the temperature, the worse the quality of LED lamp. The lower the temperature, the better the quality of the LED lamp.
The temperature of the products of Yuji lighting is controlled within a reasonable range, and a certain margin is reserved. The temperature of low-quality products has been seriously out of control.
General quality products
Whether the temperature is effectively transferred: As the heat transfer requires time and temperature difference, the chain usually decreases from LED temperature to substrate temperature to radiator internal temperature to radiator surface temperature.
The judgment is based on the fact that the smaller the temperature difference of each node of the chain (within 10 ℃), the better the heat dissipation design, and the better the quality of the product. The larger the temperature difference is, it means that the heat of LED and drive is not fully transferred and radiated, and the worse the product quality.
This also answers the initial question. When you touch the LED bulb, the high and low temperature cannot be used as the basis for judging the quality of LED products. The high temperature of the housing does not mean that the quality of the LED bulb is poor, and the low temperature of the housing does not mean that the quality of the LED bulb is good. The key is to see whether the heat transfer is effective.
5. Change of cold and hot light parameters: Use the integrating sphere photoelectric test system to test the cold state and steady state light parameters respectively when the LED bulb is cold and lit for at least 1 hour.
The changes of luminous flux, color temperature, color rendering index and SDCM were compared. The smaller the change, the higher the stability of the LED. The greater the change, the worse the quality of the LED lamp.
The performance of Yuji lighting products in terms of heat and cold is that the luminous flux deviation is within 5%, the color rendering index is stable and increased, and the color tolerance is only increased to 2.1.
For the products with poor quality, the luminous flux decreased by 13.36%, and the color rendering index decreased from 96.5 to 94.8, which was inconsistent with the claimed 95 + color rendering index. The color tolerance has also increased to 4.2, indicating that the color has shifted.
Generally speaking, low-quality products may be caused by the pressure of price competition and unreasonable pursuit of interests. To make high-quality products, we need to have sufficient technical reserves, profound product understanding and understanding of demand, perfect quality management process, and unremitting pursuit of high-quality products.
]]>Debates are often heard about which of the different weight LED bulbs are better quality. Some people think that heavier LED bulbs are better quality, and some people think that light weight is better quality in turn.
So, does the heated LED bulbs have the better quality? Is the heavier one better, or the lighter one? How can we distinguish the quality of LED bulbs from bad? These become a topic worth discussing.
We don't need to light the LED lamp first. We can see a lot of details about the quality from the packaging of the lamp.
1. Exquisite packaging design: Manufacturers or brands with deep understanding of products and quality control will choose packaging with exquisite design and strong materials, which can provide good protection for LED lamps.
In order to allow users to fully compare and understand the products, many product parameters will be listed on the package:
2. Important parameters: Brand, power, luminous flux, color temperature, lighting angle, applicable voltage and grid frequency, input current of lamp, whether dimming is supported, etc.
3. Necessary information: Rated service life, precautions for use, applicability to wet environment, product size, weight, power factor, certification and regulations that the product complies with, energy efficiency identification, power consumption under working mode, additional functions of the product, power conversion that can replace the traditional bulbs, etc.
When you open the package and see the LED bulb, the high-quality LED bulb will leave a very good impression.
4. Clean appearance: Except for the printing on the lamp, there are no abnormal impurities and dirt.
5. Compact package: All parts are well fixed, and there will be no obvious sound when shaking the bulb.
6. Printing of products: The printing is clear and beautiful, and the information is complete and accurate. At least including power, luminous flux, color temperature, lighting angle, applicable voltage and grid frequency, input current of lamp, whether dimming is supported, etc.
In general, the packaging of high-quality LED bulbs and lamps can leave the impression that they are clean and tidy, informative and accurate, with necessary warnings and application instructions.
Take the LED A60 / A19 as an example. Now let's turn on the LED A60 bulb.
1. The ray of light is uniform and soft: The light emitted by the high-quality A60 bulb should be uniform and soft.
2. High color rendering index: Its light should have high color rendering. This can make you see the color of a picture more realistically and vividly under the light, or it can be used to fill up the light for objects or people when taking photos, or it can be used for more professional work on color.
3. Stroboscopic: Its light will not have stroboscopic. If people work and live under the stroboscopic light for a long time, it will endanger people's health, and even cause serious damage due to the visual retention effect caused by stroboscopic light in special workplaces.
4. Spectrum: A good LED light can even simulate the effect of sunlight to make you feel like bathing in the sun. It will also consider the factors of health rhythm for you, so that you can concentrate on improving efficiency at work. Relax fully during rest and go to sleep safely.
A good LED bulb will certainly perform well in reliability. The reliability mainly includes the management of LED temperature, the reliability of driving, and the matching of driving + LED + shell heat sink.
The management of LED chip temperature: As we all know, LED is a semiconductor light-emitting component, so it will have the unique property of semiconductor components: sensitivity to temperature. This leads to the heat dissipation problem of LED, which has been researched and solved by engineers. Good heat conduction and heat dissipation design enables the heat generated by LED during operation to be effectively transferred to the shell radiator, which will make LED work at a suitable temperature, delay the attenuation of luminous flux, and reduce the color point deviation caused by temperature.
The reliability of driver: The LED cannot be directly connected to the mains, and it needs constant voltage and DC power to work normally, which requires another core component of the bulb, LED driving (power supply). The reliability of the drive also directly affects the reliability of the LED bulb. A good LED bulb will pay more attention to the design of the drive, and generally redundant part of the load capacity of the drive, and more reliable components will be used.
Matching and rationality: High quality LED bulbs can fully match the LED and driving parameters. And through the ingenious and reasonable shell heat dissipation design, the heat generated by the lamp can be quickly and effectively transferred to the outside, so that the lamp can work stably for a long time.
Good LED bulbs will take into account the certification standards of different countries and regions, power grid characteristics, temperature and humidity and other factors.
Different countries have different certification requirements for product reliability and energy-saving design, and the rated voltage also varies greatly. Correspondingly, LED bulbs should be treated differently in design and production, instead of adopting one product standard in all countries.
In some areas, the power grid voltage may fluctuate, so the LED bulbs used in these areas should be designed with special drive according to the power grid fluctuation to avoid the power changes that damage the reliability of LED bulbs caused by the power grid fluctuation. You will find that when the voltage input to the bulb changes greatly, the power of the bulb is almost constant!
In some areas, the air is humid and the temperature is high all the year round. Good LED bulbs are designed to cope with high temperature and humidity.
Unfortunately, some manufacturers and brands have insufficient technical capacity, or quality control problems, or even ignore product quality for the sake of profit. In short, there are still some LED bulbs with poor product quality in the market. What are their performances?
Product packaging:
The printing quality is not good, and a lot of energy is not invested in designing and improving the packaging.
The material of the package is soft and cannot give the LED lamp good protection.
Lack of necessary product information: For example, lack of one or more kinds of electrical parameters and optical parameters.
Lack of additional warning information and quality assurance information: Such as rated service life and precautions for use.
Lack of product certification and regulations.
Lamp body:
Very light weight, lighter than similar products of other brands.
The printing on the lamp is not clear, or even no printing. The information is incomplete, and even the rated voltage frequency is not available.
There are a lot of impurities and dirt.
The product has obvious sound with shaking.
Generally speaking, low-quality LED bulb packaging and lamps often lack the necessary product information. The materials used are often light, thin and soft, and the first impression maybe the price is very cheap.
The color rending index reached 80 barely, and even some lamps did not reach 80.
There will be some of the flicker in different degrees.
For LED bulbs with poor quality, the temperature management of LED and driving components is often out of control:
The matching of the drive + LED + housing heat sink is not good, which will make the heat generated by the LED and the drive cannot be effectively transferred to the housing heat sink, which will make the LED and the drive work under high temperature conditions.
Moreover, the heat dissipation capacity of the shell of this product is often insufficient. Even if the heat is transferred to the shell, the shell is unable to dissipate the heat, resulting in a short service life of the product.
In order to reduce the cost, some manufacturers meet the requirements of the rated photoelectric parameters, and even let the LED and the driver run overloaded, such as allowing the LED with the rated current of 100mA to work at 120mA, or allowing the driver with the rated power of 10W to carry 15W LED lamps. This approach is very risky and unreliable.
The power of low-quality LED bulbs often changes with the fluctuation of the power grid. This easily causes led and drive losses.
Bulbs often do not meet the certification, or at least some of the items that do not meet the certification, such as electromagnetic compatibility.
]]>Please read this blog and understand their differences. It will help you make better decisions about which works best for your needs.
The major difference in light produced by these LED bulbs:
PAR LED bulbs produce a spotlight (a narrow beam),such as 24 beam angle or 36 beam angle etc.
BR bulbs are considered to be a flood light (wide beam angle).
PAR stands for "Parabolic Aluminum Reflector". These bulbs have a lamp, a reflector and a pressed lens inside the lamp to provide directional illumination. PAR bulb has a much narrower beam angle than BR bulb. PAR bulb has a smaller diameter, and they can spread light at lower angles of 24 degrees, 36 degrees, or 45 degrees. The PAR30 that YUJILEDS is currently selling is 36 degrees. We can also provide customized products with a lower angle of 24 degrees. (If you have any requirements, please contact our webstore team directly.)
These PAR30 products work well in applications requiring directional light, such as spotlights or retail displays, and are sometimes used to illuminate exterior landscapes. Their bodies are shorter than the bowl-shaped BR bulbs. PAR bulbs have a softer light but have a more defined edge than BR bulbs, which means they may create more shadows, depending on the application.
BR stands for "bulged reflector". BR bulbs traditionally have a bulged reflector inside the housing to increase the amount of light they emit, giving them a slightly bulging shape. This also produces softer light for viewing wide areas without harsh edges or shadows.
BR lights have a larger diameter, which means they also have a larger diameter beam angle. BR lights may have a beam angle of 90 degrees or more. Now, YUJILEDS provides the BR30 lights with 180 degrees. This makes them a popular choice when you need to light a wide area with one bulb. They are ideal for recessed lighting, often found in rooms with high ceilings or on staircases. Wide coverage helps reduce shadows in areas of use.
|
YUJILEDS PAR30 |
YUJILEDS BR30 |
Dimensions |
Φ95mm*H127mm (Φ3.74 inch* 5.00 inch ) |
Φ96mm*H135mm (3.74 inch* 5.31 inch) |
Power |
20W |
16W |
Luminous Flux (lm) |
1600lm |
1200lm |
View Angle |
36° |
180° |
Input Voltage |
AC 120V/230V |
AC 85-265V |
Dimmable |
Yes |
No |
CCT |
3000K/4000k/5000K |
3000K/4000K/5000K/6500K |
BR and PAR bulbs are relatively close in diameter. PAR20 bulbs are approximately 2.48 inches in diameter, while a BR20 is approximately 2.5 inches. The PAR30 from YUJILEDS has a diameter of 3.74 inches, the same 3.74 inches as the BR30. The PAR38 and BR40 are also the same diameter at 4.72 inches. BR lights tend to be taller due to the bulged reflector. For example, the height of YUJILEDS PAR30 is 5 inches, and the height of BR30 is 5.31 inches. However, both should be able to easily mount your recessed lighting without affecting your use.
There are no fundamental color differences between BR and PAR lights. Both types of lights can produce the same color of light, but you must check the color temperature of each bulb to make sure it provides the color you want. Different light bulbs have different color temperatures. You can choose warm light or cool light.
At present, YUJILEDS PAR30 and BR30 have two series of products, CRI-MAX and SunWave series (to know more, please click the link to the series page). The PAR30 of the CRI-MAX series currently has two color temperatures of 3000K (warm white) and 5000K (neutral white), and the PAR30 of the SunWave series has a color temperature of 4000K (neutral white); the BR30 of the CRI-MAX series has 3000K (warm white) and 5000K (neutral white), and the BR30 of the SunWave series has three color temperatures of 3000K (warm white), 4000K (neutral white) and 6500K (cool white).
BR LED bulbs can be used for general ambient lighting in a home or office. They work well in recessed cans (that accept E26/E27 mounts) in kitchens, hallways, stairwells, and family rooms. Their wide beam angle makes them ideal for general interior lighting within ceiling fixtures or downlights.
In contrast, PAR lights with narrow beams are used for security lighting, accent lighting, and task-based lighting. They also work well in restaurants, bars, art galleries, museums and in showroom or retail store lighting to emphasize or highlight specific artwork or retail products.
Both BR and PAR LED bulbs are ideal replacements for incandescent or halogen bulbs because they are more energy efficient. With this article, you should have a better understanding of the difference between BR bulbs and PAR lights, and presumably you can already choose the right bulb for your lighting project. If you are still not sure what is right for you, please contact our customer service team.
]]>A dimmable LED lamp can be dimmed by a dimmer controller, making a space brighter or darker. Tunable LED lamps (also called tunable white LED lights) allow users to control the color temperatures.
]]>A dimmable LED lamp can be dimmed by a dimmer controller, making a space brighter or darker. While dimming the LED lamp, the color temperature will not change.
There are two major ways: Pulse Width Modulation (PWM) and analog dimming. PWM offers 100% of dimming by changing the time the LED bulb is ON and OFF, instead of depending on voltage change to affect its brightness. The process happens in just several milliseconds, which won’t be noticed by human eyes. For instance, if you wanted to dim your LED lamp to 10% brightness, then it would be 'on' for 10% of the time and 'off' for the other 90%. In contrast, analog dimming controls the current going into the LEDs, reducing or increasing correspondingly, to dim the lamp.
A dimmer is needed for a dimmable LED lamp. The dimming performance of a lamp depends on whether the LED driver and the dimmer are compatible. The drivers are various in the LED industry as well as the dimmers. Leading-edge dimmers and trailing-edge dimmers are two commonly used dimmers for LED dimming. They both achieve dimming effects by phase-cutting waveforms to change the current the LEDs get. The leading-edge dimmer is suitable for high-voltage lighting. The trailing-edge dimmer, on the contrary, is better for low-voltage applications. So do some studies and make sure that you find a premium dimmer working with your LED lamp.
1. Flickering: some LED Lamps flicker and dimmers may cause flickering, too.
2. Smoothness: the light may not dim smoothly.
3. Dimming Range: most LED lamps have a dimming range from 100% to 10% while some filament bulbs can dim down to 1% to 2%.
4. Compatibility: Make sure your LED lamp is compatible with most LED dimmers on the market.
YUJILEDS®’s dimmable LED bulbs with smooth dimming down to 5% offer you the most flexibility to control the brightness in your place without any flickering. Check Yuji dimmable LED bulbs below:
CRI-MAX™ CRI 95+ A19/A60 11W Dimmable LED Bulb 2700K 3000K - 4pcs
CRI-MAX™ CRI 95+ 20W Dimmable PAR30 LED Bulb 5000K
CRI-MAX™ CRI 95+ GU10 6W Dimmable LED Spotlight 2700K - 6pcs
CRI-MAX™ CRI 95+ A19/A60 6W Dimmable LED Filament Bulb 2700K - 4pcs
Tunable LED lamps (also called tunable white LED lights) allow users to control the color temperatures. By adjusting the LEDs inside the lamp, you can tune the color temperature from soft warm light to cool white light.
To achieve the tunable effect, manufacturers assemble different color temperature LEDs in a bulb or on a strip. By controlling the LEDs inside, turning one on and the other off, you can choose the color temperature you want in the available range.
Circadian lighting: Tunable lamps can work as your circadian lighting. You can tune the light to cool white to help you to be more alert in the day and to warm light to prepare yourself for a good sleep.
Mood lighting: Change the color temperature according to people’s moods or needs and create a comfortable lighting experience that adapts to any atmosphere. It is useful for interior designs, illuminating thoughts and sentiments in a place, involving people in these thoughts and sentiments to emphasize the influence a space has on people.
1. Full-color-tunable: Full-color tunable LED lights also called RGB, GRBA, RGBW, or color-changing lights, usually have three or more different monochromatic LEDs to produce different light colors. Full-color tunable LED lights are capable of providing several saturated colors, which is ideal for entertainment applications like theaters, bars, or theme parks.
2. Dim-to-warm: Dim-to-warm LED lights are designed to simulate the dimming performance of incandescent lamps, usually dimming from around 3000K down to 1800K. During the
3. Dimming process, the light color turns warmer visually. These lights are well suited to applications like restaurants, lobbies, or guestrooms where incandescent-like dimming is desired.
4. Tunable white: The color temperature of tunable white LED lamps can be adjusted from warm white to cool white in a specific range. Tunable LED lights are prized in various applications such as accent lighting and residential lighting.
YUJILEDS® provides a multitude of high-quality tunable LED lights that are ideal for a variety of lighting applications.
YUJILEDS® 3-in-1 RGB LED Flexible Strip - 60 LEDs/m - 5m/Reel
CRI-MAX™ CRI 95+ Tunable White LED Flexible Strip 2700K-6500K - 5m/Reel
CRI-MAX™ CRI 95+ Dim to Warm LED Flexible Strip 1800K-3000K - Human Centric Lighting - 5m/Reel
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Relamping literally means “replacing the bulbs in lighting fixtures.” But it represents a more innovative, energy-friendly, and cost-saving way of replacing or upgrading your lighting system, including replacing outdated lamps such as halogen, incandescent, or fluorescent lamps with LED lamps as well as properly dumping old bulbs.
Replacing outdated lamps with LED lamps helps to save energy because LED lights can save 50% to 90% of electricity compared to traditional lights, and LED lights have a lifespan of up to 50,000 hours, which is 20 times longer than traditional bulbs.
These days, LED lights have been widely used. But does it mean that you would never have to relamp if you were using LED lights? The answer is “No”. Poor-quality and overused LED bulbs undoubtedly will cause more problems.
Lighting affects how people feel in a space. Maintaining a comfortable and pleasant home lighting environment is as important as choosing the right lights. You spend most time of your day at home. Think about what you do: watching TV, reading, dining and chatting with your family and friends, and sleeping.
A home is a place for relaxing. If you keep using the old LED bulbs as they get dimmer, you may get eye strain. Then how can you enjoy your time at home?
The light output of bulbs decreases before the bulbs completely burn out. It is suggested we should relamp when the bulbs have reached 60% to 70% of their lifespan. Therefore, regular relamping is necessary in order to maintain the ideal brightness at home.
However, besides brightness, more things needed to be considered when you decide whether to relamp or not, such as cost, maintenance, light quality, efficiency, etc. When it comes to residential lighting, you should also give special emphasis to eye comfort and lighting experience.
So, for residential home lighting, you will at least have to take into account the following factors:
1. Light glare: UGR<19
Low glare creates a pleasant lighting environment, and it is also the key to comfortable home lighting. When you are watching TV, you may see a piece of brightness on the TV screen and you can’t see the entire screen clearly. That is because LED lights sometimes cause extreme brightness differences in a bright flat surface like a screen or a page of a book, which refers to “glare”. LED glare reduces visibility and causes visual fatigue. UGR (Unified Glare Rating) is used to measure how much an LED produces glare. According to the European Standard BS EN 12464: 2002:
As we can see, UGR<19 is best for home lighting. To read, study, watch TV, or play games at home, you have to look at a fair flat surface or a screen for quite a long time, where you can easily see glare if you are using high glare LED light source. Replacing your lamps with low-glare LED lights reduces glare and improves eye comfort.
2. Circadian rhythm
Have you got trouble falling asleep? There are many reasons causing insomnia. The late afternoon coffee, the blue light emitted by cellphones, and maybe the light! If your body doesn’t work well with your sleep schedule, the lights in your bedroom may be the main reason. Lighting has a great impact on our circadian rhythm. The circadian rhythm regulates the 24-hour sleep/wake cycle of our brains and affects internal functions like alertness, hormone release, etc. Natural daylight goes well with our circadian rhythm since humans have used natural daylight in their daily lives for a long time before living indoors. However, living in a modern world where we are always sitting under artificial lights, facing a dizzying computer screen, and checking social media on cell phones, our internal rhythms are easily discordant because of lack of natural daylight.
Studies show that different lights have different influences on human circadian rhythm regulation. Sunlight at noon or in the afternoon increases alertness and efficiency, and sunlight in the evening helps the mind set up resting mode. By imitating the sunlight changes, circadian lighting (human-centric lighting) matches our body’s circadian system and helps improve our productivity during the day and sleep quality at night.
So, if you always have trouble falling asleep in your bedroom, consider replacing the lamps with circadian lights that mimics sunlight in the evening. And if it is hard for you to concentrate on your work or whatever you are doing over a long period of time, circadian lights will also be helpful.
3. Flicker-free
Make sure lamps in your house are flicker-free. You may ask “I never see my LED bulbs flickering. Are they flicker-free?” Well, some LED bulbs flicker invisibly because they flicker at a swift speed that is not noticeable by human eyes but they will show stroboscopic effects. A series of static and individual images are created when moving an object under a fluctuating light source. This is called a stroboscopic effect.
Whether the flicker is visible or not, it is harmful to our physical and mental health, causing eye strain, fatigue, irritation, and headaches.
So, don’t just replace your traditional bulbs with some LED bulbs you bought online randomly. Make sure the bulbs are indeed flicker-free. Check whether there is a “flicker-free” symbol on the package of the bulb or confirm it by reaching out to the storekeeper.
As for the bulbs you are already using at home, don’t worry, there are ways to verify the flicker of the bulbs. Turn your smartphone camera into slow motion mode, set both resolution and video frame rate at the maximum (like 4K at 240fps), and leave the camera as close to the LED bulb as possible. If the images on your smartphone remain stable in brightness without dark stripes scrolling, then maybe the bulb is flicker-free. If not, replace it.
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High bay lights are used to illuminate spaces with high ceilings. That usually means ceilings ranging from 20 feet to approximately 45 feet in height from the floor. High bay lights have high lumen output and are intended for industrial and commercial environments.
Lighting performance is a key factor in evaluating the move to different types of lighting. From a performance standpoint, high bay light outperforms other similar products.
The special design of the LED makes it possible to distribute the light evenly over the intended surface. In addition, LED light source is a type of light source that can achieve high CRI in terms of light-emitting principle. You can choose high CRI LED high bay with higher light quality according to your requirements. The color of the object when they are emitted by the LEDs is very close to the color of the natural light. In terms of CRI, the high bay lights generally score higher in comparison with most other bulbs, and the LED high bay lights also have a series of CCT options for customers to choose to satisfy their different needs.
Energy saving is currently the main driver behind the switch from current lighting to LED high bay lighting. According to published data, by switching to LED lighting, people can immediately reduce energy consumption by 40%-60%, thus achieving the purpose of saving electricity costs.
Although the initial cost of LEDs tends to be higher, their longer lifespan makes up for this. LED lights typically last four to forty times longer than many traditional commercial lighting bulbs, which means that worn-out bulbs don't need to be replaced frequently, greatly reducing the maintenance costs.
High bay lights are currently used in a variety of commercial and industrial applications, including workshops, warehouses, manufacturing plants, fitness centers, indoor sports fields, zoos, airports and large retail stores. Their high power and small size make them ideal for applications where conventional lighting cannot provide sufficient illumination.
YUJILEDS currently has two mid-power UFO high bay lights available sale-150W UFO light and 200W UFO light both with a high CRI of 95+. They have excellent durability, high lumen output and compact design that is easy to set up and install. This design provides highly concentrated lighting while maintaining a high energy efficiency and low maintenance costs.
Marwell Zoo in UK
Low power (30-90 watts) - They are most popular with users who want to light up smaller areas in the most energy efficient way possible. They are common in commercial facilities, including retail shops, offices, parking garages and gas stations.
Medium power (100-230 watts) - In the medium power range, these medium power high bay lights are by far the most popular for commercial and industrial users. Lamps in this wattage range provide the best balance of lumen output and power consumption for most applications and are commonly found in warehouses, commercial facilities, and manufacturing centers.The power of the high bay lights currently sold by YUJILEDS is within this power range.
High power (280-360 watts) - These lamps provide the most intense lighting while still delivering the energy efficiency benefits of LED technology. Most used in sports fields, stadiums and other high ceiling installations that require a lot of light.
Currently in the market, lumen output has replaced wattage as the main indicator of light performance.Here's a list of a few common lumen ranges we've listed to help customers choose from and purchase:
Low lumens (4,000lm-20,000lm) - Lamps in this lumen value range are primarily used in applications that require high value lamps while having very good energy efficiency. These lamps are typically used to illuminate small to medium areas in manufacturing and commercial facilities, or non-critical areas that do not require intense lighting.
Medium lumens (21,000lm-35,000lm) – Lights with this lumen are by far the most popular and are typically used in warehouses and large commercial facilities as they are a good balance between lighting capacity and energy efficiency.
High lumens (40,000lm-50,000lm) - Lights in this range are by far the most powerful and use maximum lighting as the primary goal. They are usually used in sports stadiums, arenas and public places, which require abundant and intense lighting.
In addition to choosing the correct wattage and lumen output, you also need to choose the correct CCT for the application. For example, some CCTs can improve worker concentration and productivity, while others are more suitable for relaxation and positive emotions. Regarding how to choose the color temperature, we also briefly summarize it for your reference:
3000K – 3000K is a warm color LED light mainly used in restaurants or houses. So, it's hard to find 3000K high bay lights on the market because these lights are designed for warehouses, industrial and commercial applications, not residential or hotel lighting applications.
4000K – 4000K is a natural color of light that you'll often find in your workspace. There are electrical contractors and construction industry customers who like this color temperature. Because it gives a warm atmosphere and it is very close to the color temperature of traditional lighting such as HID and fluorescent lamps.
5000K – 5000K LED high bay lights are by far the most common. This color temperature casts light closest to the cool white lighting of a daytime environment. This is ideal for general lighting in warehouses, manufacturing facilities and other commercial spaces that require precise lighting. This color temperature is also most effective in higher CRI lighting, as it is the most natural of all color temperatures.
YUJILEDS currently has two types of UFO high bay lights availableon sale, namely 150W High Bay UFO LED Light and 200W Motion Sensor High Bay UFO LED Light.
YUJILEDS High Bay Light |
||
|
YJ-BC-UFO15-3030 |
YJ-BC-HB-NTR43 |
LED Wattage |
150W |
200W |
Lumens |
13600 lm |
22000 lm |
CCT |
4000K/5000K |
4000K/5000K |
Viewing Angle |
120° |
60°/85°/100° |
CRI |
95+ |
95+ |
Dimmable |
Yes |
Yes |
Application |
Mid-sized areas warehouse/factory/studio/zoom/airport… |
Mid-sized areas warehouse/factory/studio/zoom/airport… |
These two high bay lights are designed for both industrial and commercial applications and provide ultra-high color quality of CRI 95+ and extensive brightness. They both can be easily installed in most areas by hook mount or chain mount.
The above are some purchasing suggestions for high bay lights, you can feel that by switching to LED lights, you will immediately see energy saving, reduction in the frequency of lighting maintenance, and improvement in overall lighting performance. Feel free to contact us with any questions.
]]>Most of photography application wants lighting with high CRI & luminous efficacy(lm/W), but these two cannot be achieved altogether. In fact, it can be easily found from the LED market that they announce their LED has 140 lm/W or even 160 lm/W with CRI 70 or 80,but there can be rarely found LED has 140/W with CRI 95. Yuji now launches BC-2835DL with 140lm/W & CRI 97, 40% efficacy increased.
The lighting of filming site is sometimes limited by rated power of the power supply. If the power of the power supply is not enough to reach sufficient illuminance, the only way is to pull the light source closer to obtain sufficient illuminance. The shortening of the distance between the light source and the shooting object will lead to the failure to achieve the desired result in some filming scenes.
• High luminous efficacy LED means more lumen output at the same electrical power.
This makes the portable batteries in lighting kit last much longer.
• High luminous efficacy LED means higher light conversion and less heat conversion.
Less heat leads to increasing stability of light emitting and color coordinates shift.
• High luminous efficacy LED means higher ratio of lumen per dollar.
• High efficient LED may more expensive than normal LED, but improvement on
optical performance, heat dissipation performance and PCB substrate saving will
save more in further steps.
Valid for:
The classification - Exempt Group (RG 0) is complied for all Yuji SMD LED.
Click here to acquire Yuji LED - IEC 62471 certificate
IEC/EN 62471 gives guidance for evaluating the photobiological safety of lamps and lamp systems including luminaries. Specifically it defines exposure limits, references measurement techniques and the classification scheme for the evaluation and control of photobiological hazards from all electrically powered incoherent broadband sources of optical radiation, including LEDs (but excluding lasers), in the wavelength range from 200 nm through 3000 nm.
According to EN 62471:2008 sources of optical radiation are classified into risk groups subject to their potential photobiological hazard.
The photochemical retinal hazard involves a photochemical process in which highly energetic short-wave radiation causes damage, in some cases irreversible, to the retina.
The main area of concerns lies between 400 nm and 500 nm (= blue light). The critical aspect in terms of the harm potential however is not the blue component itself, but rather the energy content in this range of the spectrum, which depends essentially on the luminance (effective blue light radiance).
Gazing up at a blue sky (very high proportion of blue light, but scattered, so luminance low), for example, is completely harmless, but even very brief exposure to direct sunlight, which has a very high radiance, can lead to damage.
The radiation absorbed — which depends on the intensity of the incident light and the length of exposure — causes photochemical decomposition of the pigments present in the photoreceptor cells. The photopigment fragments thus created act as free radicals, leading to the death of the photoreceptor cells.
A widespread rumor is that LED has more than 100,000 hours lifespan, which is simply not true. Unlike other lighting sources, LED rarely fails abruptly. Instead, the intensity of LED emission degrades gently. After 100,000 hours, LED may still work, however, it probably cannot provide usable light any more.
An approach to estimate LED lifespan is to measure the luminous flux remaining after a certain period, which is called lumen maintenance. The corresponding approaches are specified in the standard LM-80-08 and TM-21-11 authored by IESNA. LM-80 defines test methods to collect data of LED output performance at selected elapsed time at 3 different operation temperatures. While TM-21 details how to extrapolate the future performance from LM-80 data tested in a relatively short term.
All products in YujiCapture series took the tests of LM-80 for 9,000 hours, 1.5 times longer than the minimum requirement, after which, they still illuminate more than 95% of the original lumen. Satisfying with the prediction method 6X specified in TM-21, L70 (time elapsed to 70% lumen maintenance) is larger than 54,000 hours. Thus, benefits from Yuji’s unique phosphor technology and advanced thermal dissipation design, the long life time not only reduces your maintenance cost, but also makes your equipment more reliable, with which you could focus on your creation instead of the trivia about the tools.
All YUJILED SMD products on the website and in our LED catalogs comply with the Restriction of the Use of Certain Hazardous Substances (RoHS) in Electrical and Electronic Equipment.
The LED chipsets used in the luminaires are Pb-free soldering compatible (Max Soldering Temp. 260℃) so that these LEDs can be used as environmentally safe products.
Click here to acquire Yuji LED - RoHS compliance
Here is the RoHS website for more info.
The CE mark is mandated for certain products sold within the European Economic Area, enabling freedom of movement in the European market.
This marking means that the manufactured product meets EU safety, health and environmental standards that have been stipulated by legislation. Products demarcated with CE are not necessarily produced in Europe, but the marking means they can legally be sold there.
Click here to acquire Yuji LED - RoHS compliance
Here is the CE mark website for more info.
If you have any questions or concerns regarding the certificate or compliance of our LED products, please contact our support team and they will be happy to address your concerns in a timely manner:
https://www.yujiintl.com/contact.html
To provide reliable and reproducible accurate measurements of photometric, colorimetric and electrical parameters of LEDs, YujiCapture applies standardized instruments, the Everfine test system, including the world-leading high-speed spectroradiometer HAAS-2000 and integrating sphere with advanced coating for perfect diffuse performance, under strict conditions, such as constant 25℃ ambient temperature, which fully meet the procedures and precautions described in IESNA LM-79. Besides, the instrument error and calibration cycles are handled cautiously by our expertise engineers to ensure the accuracy of the results.
Therefore, from YujiCapture, you will not only get professional detailed specifications, including luminous/radiant flux, electrical power, luminous efficacy, spectrum power distribution, chromaticity coordinates and etc., but also could trust them. These will surely promote your original design of any photographical or cinematographic lighting systems.
]]>As widely recognized by the photographic industry, the accuracy of chroma is the top critical factor that affects the lighting quality, even more important than color rendition.
YujiCapture™ optimizes a special selection of color tolerance of 50% more consistent compared to standard LED. Centering on the blackbody locus, YujiCapture™ presents a most ideal white light at different correlated color temperatures to eliminate the color deviation essentially.
Common standards to measure the color of LEDs are SDCM (Standard Deviation Colour Matching), also known as “MacAdam ellipse” and ANSI C78.377-201x. The later sets a 4-step SDCM for fluorescent and halogen lamp. However, most LED manufacturers defines a 7-step SDCM for commercial applications compromising to the cost.
Benefits from Yuji’s own state-of-the-art phosphor technology, YujiCapture maintains a 3-step SDCM, where the color deviation is less than 50% of common LEDs. The more concentrated chromaticity presents perfect white light for professional photographer to capture.
Meanwhile, we provide 4 conventional CCTs (correlated color temperatures) in photography and film lighting industry. 2700K and 3200K mimics the tungsten tune, while 5600K and 6500K are the reference of direct and northern daylight.
Feel the difference you will get from YujiCapture compared to other common LEDs.
TrueChroma technique helps YujiCapture to achieve even more accurate color when integrating LEDs on PCB.
The key phenomenon is that the chromaticity deviation of LEDs obeys normal distribution (both in x and y direction). According to the law of large numbers in probability theory, the average of results from a large number of trials should be close to the expectation value, and tend to be closer if more trails are performed. The expectation of a normal distribution is “the most middle value”, in this case, is the target chromaticity coordinate. Thus, with more LEDs on one board, their average chromaticity coordinate is closer to the target coordinate, which makes emission light more accurate.
TrueChroma ensures that the LEDs we picked up when designing PCB obeys normal distribution and their positions are also well-arranged. Thus, the actual chromaticity range for LED fixtures could be narrow to 1/4 of that of LEDs.
Multiple-dimension CRI assessment, brand-new attitude.
Individual high CRI is inconvincible, LED is always used as a cluster regardless as a panel for soft light, or a Fresnel for hard light. Usually an alleged high CRI score LED on the market is picked as a best result from a batch of production intentionally, which misleads the user’s understanding of the real performance of the products. For industrialized production, there is always a distribution of different CRI scores which sometimes confuses users to decide what to choose and what exactly the actual result could be, we help users to improve this uncertainty under control to understand how stable the light performs.
Besides the industrial highest CRI, YujiCapture™ also cares about the industrialized consistency, based on the big data of production, Yuji is first and the only one in the world that introduces the support of TrueCRI™ which collects the average CRI performance with statistical data to provide accurate evaluation assistance for users.
For example, when users choose a batch of YujiCapture™ 2700K LED with the quantity over 10,000pcs, we help to estimate the best Ra will be 99.1, the worst Ra 94.3, average Ra 96.7, and all details of each color render can be evaluated from the charts. And Within this batch, the ratio of Ra > 95 is 98.59%, Ra > 90 is 100%; R9 > 90 is 98.59%, R9 > 85 is 100%.
The metric for photographic specially.
TLCI is an independent metric that evaluates the lighting quality at the television dimension. Compared to CRI, TLCI cares more about camera response and the calculation of TLCI is more focused on the spectrum, where generally the true color rendition always relies on the spectrum. It is possible to get an LED with poor TLCI score but high CRI result, therefore it is necessary to formally introduce TLCI as the YujiCaptur™standard specification to help users distinguish and compare CRI and TLCI to evaluate the lighting quality for photographic lighting more accurately.
A most comprehensive metric for color rendition.
The TM-30 metric is accepted gradually because of its multi-dimension assessment of color rendition. Compared to CRI, TM-30 picks 99 color evaluation samples from more than 100,000 collected world possible colors. Additionally, TM-30 separates the fidelity and gamut evaluations to present a most objective result.
YujiCapture™ is the first one that introduces the latest TM-30-18 as a standard specification to help with LED users understand the actual performance with this metric. In a shoot scene that generates complex color environment, the performance with TM-30-18 contributes to a multidimensional evaluation for post production.
]]>There are occasions in life that strange phenomena are observed: when rapidly waving a pencil under a lamp, it is a series of static and individual images are created which is known as Stroboscopic effect. This effect captures the impression of rapid light flux fluctuations, which our vision perceives as flickering.
This phenomenon, whether noticed or not, occurs due to the change of visible light intensity over time; a light flicker. LED lights exhibit rapid repetitive changes in brightness over time which can cause visual, physiological, and neurological effects on our bodies; eye strain, fatigue, headaches, and difficulty in concentration. Light flickering occurs all the time, even when we don’t notice it.
Flicker index: Flicker index is defined as a measure of the cyclic variation taking into account the shape of the waveform. It covers 0.0~1.0. The greater the flicker index, the more substantial the flicker and the less stable of light output.
Percent flicker: Percent flicker, also known as modulation depth, is a relative measure of the cyclic variation in the peak-to-peak amplitude of light. It covers 0%~100%. The greater the percent flicker, the more substantial the flicker.
By adoption of one or both methods mentioned above, the flicker index of an LED lamp will fall between 0.001 and 0.01, and the percent flicker down to 0%-5%. While the flicker index and percent flicker stay at low values, the flicker frequency will normally be read as 0.0Hz by a professional flicker meter. For those lights that require the flicker index and percent flicker above 0, designing a modulation frequency greater than 3125Hz will turn it into a high-frequency exemption level.
Without complicated and expensive measurement devices, your smartphone can be used to verify the flicker of an LED lamp. Unless needed, use a professional flicker meter. Turn your smartphone camera into slow motion mode, set both resolution and video frame rate at the maximum (like 4K at 240fps), and leave the camera as close to the LED lamp as possible. At this time, if the images on your smartphone remain stable in brightness without dark stripes scrolling, congratulations, your LED may be the real flicker-free.
If unfortunately, you have observed flickers in your LED lamps, then please email us or call us to name your preferred bulb type, or choose from our catalog by yourself, because they are truly flicker-free.
]]>Lumen usually indicates how much light the light source emits. Lumen is only related to the light source itself. A light source consists of a lamp or lamps that are in proximity.
Lux is used to describe how much light reaches the plane to be measured. This value is not related to the number of light sources, the distance from the light source, or even the directionality of the light source.
The image below shows how Lumen and Lux are different.
Lumens are how much light is given off. It’s a parameter used on a datasheet or packaging to describe a light source. However, we often use multiple light sources when we design lighting distributions. A complicated area may involve multiple groups of light sources with different power. In this case, the designer converts lumens to Lux and calculates the light in the environment.
It is not difficult to convert the lumen of a light source into lux. One lux is equal to one lumen per square meter (lux = lm / m2). what we need to do is to measure how big is the irradiated area.
The illuminated area is calculated from the distance from the light source and the beam angle of the light source.
In the face of multiple light sources, the calculation method of lux will become complicated. Usually, the lamp manufacturer will provide the IES file to describe the change of the lux of the lamp to facilitate the designer to design the lighting.
Usually, designers import IES into lighting design software like DIALux. After that, the software will automatically calculate the lux of any room position according to the lamps’ installation position. After that, the lux in some specific locations in the house must meet lighting standards. Different regions give different indoor lighting standards, such as the United States (ANSI/IESNA RP-11-1995), the European Union (EN 12464-1-2011), and China (GB50034-2013). Of course, these standards are only minimum. Satisfying these lighting designs is only acceptable. How to let the light shine where it is needed and avoid wasting it where it is not needed is what professionals need to handle.
]]>In the previous article, we discussed how to choose the lights, and now we'll focus on how to arrange your lights.
What many novice streamers don’t know: it is more important to know how to position the lights.
As you might have noticed, there’s more than one way of setting up lighting for your live stream. It all depends on what kind and how many lights you have. But if you want your entire setup to show on the screen, you’ll need more powerful light sources.
First of all, we want to make sure that our new lighting setup is made of LED lights. This is because, among other light sources, LED lights are known to consume less power, give brighter light, give off little heat, and can dim better.
Therefore, a little bit of help from more advanced light technology is necessary. For example, Yuji SunWave™ creates a full spectrum light that achieves 98% similarity to the visible part of sunlight and reaches industrial high CRI up to 99. The white color under SunWave™ full spectrum light is as pure as under sunlight.
The best overall lighting setup for live streaming is a three-point lighting setup: one configured as a key light, while the other two function as a fill light and a back light. But there are still many other ways of lighting setup.
To set a single light is simple. It is often used in video shooting of single-person appearances in the media and is dominated by low-key backgrounds. Usually, it is more suitable for review, popular science, and explanation videos. When a single lamp is distributed, the lamp is arranged at a 45° angle in front of the side of the character. The lamp position is high above the head and is buckled down 45° to illuminate so that the lighting effect is more hierarchical.
Such a single lamp lighting is very simple and easy to use for daily video shootings and single person online entertainment broadcasts.
The reason we call it “1+1” instead of "dual light lighting", is that it emphasizes the effect of one main light and one decorative light. The decorative one is to modify the character's face or eye, which will make the finishing touch.
With a ring light, you attach your camera or smartphone inside the ring, after which the light illuminates the subject from all angles, neutralizing shadows. This setup is designed to illuminate one specific subject and is mainly meant for Instagram or TikTok videos.
The double lamp lighting design is diagonal lighting, one main light and one auxiliary light/contour light. Similarly, both lights have to be placed around the characters, and the environment lighting is not taken into account, so it is also a low-key style.
The main light continues the single-light lighting style, and then on the diagonal of the main light, that is, the side and rear of the character, add a lamp to the character to play the side backlight, and lighting from the diagonal position can balance the light ratio while diluting the shadow area of the main light. It can give people a brighter outline, and the characters are separated from the background, making the picture rich and varied.
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Amateur streamers rarely use any lighting for their videos at the beginning. They may not realize how important lighting is to the final effect. Sometimes, just a little bit of lighting, such as face lighting or a backlighting will make your stream look much better.
There are two main aspects that should be important about the light: choose good lights and put them in the right positions.
High quality light can offer excellent color rendition, making all scenes more vivid.
Yuji CRI-MAX™ high CRI LED lights reaches film level qualities in presenting a true-color visual environment for both human eyes and cameras, and can particularly show the natural skin color vividly because of enhanced red rendition technology. They are excellent for film, photography, camera lighting and live stream lighting.
Powerful lights are a crucial part of every streamer’s arsenal. Cheap lights are everywhere and easily accessible, but are you sure that will be an upgrade to your light setting? Probably not.
If you want good lighting, you need strong devices. To identify lights that can upgrade your video quality, you have to look at two different segments - watt and lumen.
Let’s talk about watts first.
There’s no standard when it comes to how powerful lighting options are. They range from 50 to 10,000 watts. Assuming that you’re not trying to replicate the sun, you don’t need the strongest lights available.
Wattage is a measure of how much energy the light source consumes.
Lumen describes how much light the light source gives off. Normally, a standard 60-watt incandescent light bulb gives off 800 lumens. But Yuji high lumen bulbs offer 1100lm with only 11W power consumption, which means you will get more lumens with less money cost.
The light can look cooler or warmer in the video. The human eye can perceive this variation as well. Let’s look at an example. From cool white light in a doctor’s office to a cozy living room with warm white light setting, the former has more white or light blue tones while the latter look more yellowish. That's the concept of the color temperature, which is measured on a scale of Kelvin. It’s one of the key things to take into consideration when building your lighting setup for streaming.
To give you an idea of how different color temperatures work, we’ll look at some of them here. Let’s start with 1000K. That’s a dark orange tone you can see in candlelight. 4000K is the color of a standard incandescent household bulb. A color temperature of 10000K is sky blue. Most streamers use lights around 5000K, which is the color of the direct sunlight.
Of course, different scenes and atmospheres require different color temperatures. It all depends on your content and concept you are to create.. Some LED lights have the ability to shine the light in a yellow hue, a white/blue hue, or a mix of both. Your preference should be a lighting setup with bi-color lights that give you the ability to change the color. Yuji SunWave™ CRI 98 Tunable White LED Flexible Strip 2700K-6500K operates on two separate circuits for each color, so depending on the total current provided to each circuit, any color temperature in the range of 2700K to 6500K can be realized.
The best lights for video streaming usually give you an option to adjust brightness according to your likes. These kits can help you take your streams to the next level to adjust the light manually.
The biggest and most unique advantage of Yuji dimmable A60 LED light bulb is that it works perfectly with high CRI95+, is film grade flicker-free, and is equipped with an adjustable brightness.
Stands are another thing to take into consideration when buying a light for streaming.
They come in all sorts of sizes and shapes, and picking one that fits into your setup is extremely important. For example, massive lights won’t be cost-efficient if you stream in a small place. Sometimes, a small light is a better choice depending on the size of the room.
Some lights arrive without a stand, and you’ll need one for them to attach to Some have desk clamps instead. Before you decide on the light you want to get, think about how flexible you need the stand to be.
We will continue to talk about how to position your lights for live streaming and video broadcasting.
]]>When we choose lighting products, we will be entangled with all kinds of ideas such as:
How to calculate the number of LED lights to create a good lighting environment? The factors affecting luminaire selection are complex and diverse, but in daily life, the following basic aspects are mainly involved:
Lamp wattage
Room size
Room function
Other factors
Let's take a closer look at how these aspects vary from person to person. Only by taking a variety of factors into consideration can we choose suitable lighting products to create a comfortable lighting space.
In the previous articles, we discussed the impact of wattage/lumen,area,and room function on the choice of luminaries. In this article, we mainly discuss the influence of other factors, such as different forms of light source and interior decoration style, on the choice of lamps.
Read more:
How much light do I need for a room? (Part 1)
How much light do I need for a room? (Part 2)
When we design the light solution for a space, we achieve the desired space brightness through theoretical calculations, but after we install it, it is not always as bright as expected. Why would this happen?
Whether the light is to cast toward the wall or concentrate downward to the ground, refraction methods have a great impact on the indoor illumination. For example, a 10W A19 bulb illuminates the entire space when used in the ceiling, While a 10W spotlight installed in the same space only illuminates a small circular area below itself. If you need to achieve the same required illuminance, you should increase the number of light sources, that is, in this case, equivalent to increasing the "wattage" of the light source.
Different people have different perceptions of light. Under the same lighting conditions, some people think it is very bright while some people think it is not bright enough, which is a normal phenomenon. Different people have different demand for light. . Age, for example, largely influences human visual system and thus one’s sensitivity to light. At the age of 20, human relative vision is 100%, and the sensitivity to light is 100%; at 30, relative vision is 95% and sensitivity 100%. While at 70, relative vision falls to 35% and sensitivity rises to 200%.
That is why age should be considered when designing the lighting solution for a space.
Color tone of the space and furniture material, and size all have impacts on the lighting effect. Dark space appears dim, light space are brighter. Taller and brunet furniture tend to block and absorb part of the light, making the original brightness visually "weakened".
In this article, we mainly discuss the importance of form and CCT of the light.
Hallway:
It is better to use small lamps, downlights, small chandeliers, and induction lights.
Ceiling lights are installed on the ceiling of the entryway to distribute uniform ambient light.
There are no strict restrictions on color temperature selection.
Living room:
It is recommended to use adjustable lamps in the living room. Warm white light below 4000K can be used for watching TV, and cool white 5000K can be used for daily activities.
Bedroom:
It is recommended to choose a bedroom lamp with a color temperature of 2700~3000K. This color temperature light can create a warm environment, which can make you relax physically and mentally and fall asleep as soon as possible.
Study:
The study room is a place where you need to use your eyes for a long time. Too high color temperature can easily cause eye strain. Therefore, it is recommended to choose 4000~6000K lamps with high CRI in the study, which is the most suitable for study.
Dining room:
Comfortable experience is very important when enjoying food. It is better to choose warm colors, which can make food more appetizing. In terms of color temperature, it is best to choose 3000~4000k (warm color light), which will not make the food too distorted, but also create a warm dining atmosphere.
Kitchen:
Bright cold light sources or neutral light sources can make the kitchen bright and clean. A cool white light of about 5000K in the kitchen not only reduces your sensitivity to heat, but also stimulates your concentration and makes sumptuous meals for the family.
Bathroom:
3000K warm yellow light is recommended for the bathroom to avoid light stimulating your sleepiness.
Therefore, when doing the whole house lighting design, many factors such as room function and room size should be considered to make the home lighting environment more comfortable and meet individual needs. Yuji has the best light sources. For a long time, Yuji group is committed to providing customer with a complete lighting solution.We help consumers choose the most suitable lighting products for their own and make them wxperience the physical and mental changes brought by the real quality of the light source.
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