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

Currently, existing light sources include natural light sources and artificial light sources. Among them, the sun is a natural light source, and 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 an object is absolutely uncompromised! Among the artificial light sources, incandescent lamps and now very popular LED lamps have a very high color rendering index, which can reach about 99.5; LED lamps, with their advantages of energy saving and environmental protection, have captured "most of the market in the current lighting field". "However, the current color rendering capabilities of LEDs still need to be improved, especially the color rendering capabilities of red.

The latest quantum dot LED light source uses quantum dot materials instead of traditional phosphors, which easily increases the color rendering index of the LED to more than 95. In particular, the R9 value, which represents the red component of the light source, also reaches more than 90, which is greatly improved. The ability of LED lamps to restore the original color of objects. Not only that, after using quantum dot LED light sources in reading and writing desk lamps, the edge contours of the text will be more obvious and clear, and the recognition will be greatly improved, effectively reducing eye fatigue, myopia and other phenomena caused by blurred vision