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...
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....
Do you sometimes find it difficult to tell a deep navy blue and black apart under a dim light? You thought maybe you need to change the light to a brighter one. No, it is not about the brightness. It is probably just about the CRI.
Customers ask for high CRI LED for their plant growth projects at times, and sometimes this confuses us that why a well color rendered LED for human vision is also desired for plant growth? In order to understand this, we...
The Parameters of LED Device 1. Luminous Flux and luminous efficacy LED luminous flux is the amount of light emitted per unit time, and LED luminous efficacy is the LED luminous flux per unit power. They both indicate the luminous...
What are the characteristics of LED phosphors and their impacts on the performance of packaged LEDs? The performance of LED phosphors mainly can be divided into the powder properties, particle size distribution, and stability (aging performance), etc. Usually, luminescent performance...
What is LED phosphor？ LED phosphor, in a narrow sense, is a kind of Photoluminescent materials can absorb the energy of violet and blue light from gallium nitride or other LED chip, and transform it into visible light. Phosphors are...
Part 2. Light Intensity In color management and print quality verification processes, visual assessment of colors is a key. In order to acquire color accuracy, a proper lighting condition becomes a must. The ISO3664:2009 standard specifies a set of five...
Part 1. Color Quality While color and density measurements play important roles in the control of color reproduction, they cannot replace the human observer for final assessment of the quality of complex images. Color reflection artwork, photographic transparencies, photographic prints...
