May 8, 2019 | Liao Zhang
Near-infrared spectroscopy history and principle Infrared light is a portion between the visible and microwave regions of the electromagnetic spectrum ranging from 700 nm to 1 mm. Infrared light was discovered by a German-British astronomer named William Herschel in 1800...
April 19, 2019 | Daniel Han
CIE 1931 The CIE 1931 were created by the International Commission on Illumination (CIE) in 1931. And this is the first time human created an explanation between distributions of wavelengths in the visible spectrum, and colors can be perceived in..
April 19, 2019 | Claire An
We often see luminous flux or illumination data on the packaging of light bulbs or other lamps. Maybe you know these two parameters are used to describe the brightness of light. But what are the specific definitions of luminous flux...
April 19, 2019 | jasmine Yang
Scientific research indicates that light is one of the main driving forces of the circadian system, whether it is natural sunlight or artificial light sources, they are all can trigger a series of physiological rhythm reactions. As we all know,...
April 19, 2019 | Anthony Wan
Background Generally, in order to meet the new demand of solid-state lighting (SSL) market and communicate with consumers about the color quality of lighting products, NIST (National Institute of Standards and Technology) has developed the light color quality meter, which...
April 17, 2019 | Liao Zhang
The feeling of the sunlight, as we know, is different from morning till night in nature. According to the position where the sun moves in the sky, the color of the sun will turn into red, orange, yellow, and white....
January 7, 2019 | Nicklaus Mei
Light makes our life easy. While nowadays, light not only functions as illumination, but also aesthetic means to make life beautiful. Our dual color LED strips and RGBWW 5-in-1 LED strips are able to create hundreds of different lighting ambience...
August 2, 2018 | Daniel Han
LED soft ribbon is getting popular due to its flexibility, and YUJILEDS® also offers flexible ribbon based on its remarkable color reproduction quality. With the increasement of different applications, special environments are required for using the LED ribbons, then water-tightness...
July 31, 2018 | Daniel Han
Tighter chromaticity tolerance is always pursued by LED manufacturers since color consistency is getting more and more important. A general method is keeping the SDCM (Standard Deviation Color Matching) as a large scale, then divide it into small sections to...
May 15, 2018 | Nicklaus Mei
Why heat sink is important for LED lights? LED, Lighting Emitting Diode, is the semiconductor component which can transfer the electric energy into light. However, in the process of power transfer, apart from emitting lights, there is lot of power will be converted into thermal...
April 3, 2018 | Liao Zhang
PART V: “LIFETIME” Lifetime is a critical index for evaluating lighting fixtures. Conventional lighting fixtures are relatively inexpensive, of which the most widely adopted type is the fluorescent light, with only 3000 hours’ longevity. Compared to that, LED lights are...
October 27, 2017 | Liao Zhangv
PART IV: “COLD LIGHT SOURCE” Before LED lighting technology came to maturity, greenhouses were the major form of artificial plant factories. In greenhouses, temperature condition can be better controlled than plants grown outside, and sunlight is obtained during the day...
