The color rendering ability of the light source to the object is called color rendering, which is compared with the appearance color of the object under the same color temperature reference light source (incandescent lamp). The higher the color rendering index of the light source, the stronger the ability to restore the true color of the object. Correspondingly, under the light source with low color rendering index, the color of the object will be distorted. The most common phenomenon we find when shopping for clothes in shopping malls is that the colors of the clothes are very bright and beautiful, but when you buy them home, you find that they are not satisfactory. do not. In fact, these phenomena occur because different light sources have different color rendering properties.

The International Commission on Illumination (CIE) sets the color rendering index of sunlight to 100, and stipulates 15 test colors, with R1-R15 representing the display index of these 15 colors. When comparing a light source with a specified reference light source, the closer the color rendering index Ra to 100, the better.

At present, the existing light sources include natural light sources and artificial light sources. Among them, the sun as a natural light source, its color rendering index is theoretically 100, the color temperature of sunlight in different time periods is different, but its ability to restore the original color of the object is absolutely not discounted! Among the artificial light sources, incandescent lamps and now very popular LED lamps, the color rendering index of incandescent lamps is also very high, which can reach about 99.5; LED lamps have won most of the current lighting industry with their advantages of energy saving and environmental protection. "However, at present, the color rendering ability of LEDs still needs to be improved, especially in the color rendering ability of red.

The newly launched quantum dot LED light source uses quantum dot materials instead of traditional phosphors to easily increase the color rendering index of the LED to more than 95, especially the R9 value representing the red component of the light source has also reached more than 90, which has greatly improved The ability of LED lamps to restore the original color of objects. Not only that, when the quantum dot LED light source is used in the reading and writing desk lamp, the edge contour of the text will be more obvious and clear, and the recognition will be greatly improved, effectively reducing eye fatigue and myopia caused by blurred vision.