All About LED Technology

November 24, 2023

TM-30 Tested LED
TM-30 offers comprehensive evaluation on color quality of new light sources,providing quantified measurements on overall average properties and describing a method for evaluating light source color rendition.
The fidelity index Rf has been introduced to the Technical Report CIE 015:2018 and it is aiming to be a new standard for color evaluation. Comparing to Ri of Color Rendering Index, the Rf, CESi of TM-30-18 is more comprehensive to evaluate much more colors.
In addition to an improved color fidelity metric, the TM-30 method introduces an additional dimension to color quality through the gamut index (Rg).
The color vector graphics are very intuitive and informative tools in informing us about a color source’s tendencies.YUJILEDS provides wide ranges of phosphors that allow for manufacture of LEDs with customized SPDs that can increase saturation in particular color.
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November 23, 2023

5 Kinds of Monochromatic Light that Affect Plant Growth
Light is one of the most essential environmental factors for plant growth. It is not only the basic energy source for photosynthesis but also an important regulator of plant growth and development. Plant growth and development are affected not only by the light intensity (photon flux density, PFD), but also by the quality of light which means different wavelengths and radiation, and their different composition ratios.
Plants can detect subtle changes in light quality, light intensity, and the duration and direction of the light in a plant growth environment. Blue, red, and far-red light plays a key role in the control of plant morphogenesis of light.
Here we discuss the effects of some single-color light (with a specific wavelength band) on plant growth.
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November 23, 2023

High TLCI LED Lighting
The TLCI (Television Lighting Consistency Index) metric was developed as an alternative to address the shortcomings of the commonly used CRI when used with photographic equipment.Rather than assessing the performance of a luminaire directly, as the CRI does, the TLCI mimics a complete television camera and display, using only the specific characteristics of cameras and displays that affect colour performance.Yujileds® focuses on providing specific solutions of high TLCI LEDs for photographers and lighting equipment manufacturers for television use.
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November 22, 2023

LED Phosphors
LED phosphors are a crucial material in the manufacture of white LEDs. Phosphor chemistry and composition largely determine an LED’s efficiency, light quality and stability. Yuji is one of the very few LED companies in the world that has entire LED phosphors and packaging technologies. Multi-variety LED phosphors are the basis for YUJILEDS spectrum simulation.YUJI LEDS Phosphors consistent focus on improving the brightness and stability of red nitride phosphors has allowed us to become an industry leader in providing high CRI LEDs at efficiency levels and stability in line with standard CRI level LEDs on the market.The different types of phosphor have their own characteristics and uses.

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May 22, 2023

Different Kinds of White Tunable LED Part.2
Full-Color-Tunable products, also referred to as RGB, RGBA, RGBW, spectrally tunable, or color changing, usually have three or more different LED primaries that can be individually varied in output to create a mixture of light that is white, a tint of white, or a saturated hue.

And white-tunable and full-color-tunable products vary in their type of control, generally using 0–10 V, DMX, or DALI protocols. While each method allows the user to adjust the color and/or output of the product, they can be implemented in a number of ways.
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May 22, 2023

Different Kinds of White Tunable LED Part.1
Adjustable white lighting is one of the biggest trends in LED lighting. The dim to warm product imitates incandescent lamps, and as the product darkens, the color of the light becomes warmer and warmer in appearance. Its light color and dimming quality are highly praised in environments such as restaurants, hotel lobbies and guest rooms, banquet halls, theaters, and residential spaces.And white tunable products are very helpful in providing obvious cooling or heating for rooms, assisting in behavior control, supporting human circadian rhythm system, and correcting circadian rhythm disorders.
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May 12, 2023

Color Consistency in YUJILEDS Lighting Products
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.
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June 16, 2022

MDER, a metric that helps with your lighting design for concentrating
What is MDER and how does it work? MDER is the abbreviation of Melanopic Daylight Efficacy Ratio, which is defined by the CIE and introduced in the CIE S 026/E:2018 document. Also called the Melanopic DER, this metric is invented...
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June 16, 2022

Understanding the blue light hazard
What is exactly the blue-ray hazard? Blue light is a kind of high-energy short wave visible light (HEV), which refers to the blue part of visible light. Its harm is mainly concentrated in the 380 nm ~ 450 nm band....
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