Why is the display index of LED education lights, that is, RA index, above 90?

The most authentic and original color of things.

Well, sunlight is a natural light source that people and other organisms have gradually adapted to in the process of evolution. Therefore, it is generally believed that sunlight is the most healthy and harmless. However, in real life, many times we need artificial light source to meet the needs of our life, but there are also advantages and disadvantages of light source.

It is generally distinguished by the color rendering index

RA: 90-100 excellent

RA: 80-89 good

RA: 60-79 normal

RA: 40-59 poor

RA: 20-39 poor

The closer the color rendering index is to 100, the better the color rendering performance is. RA reaches 90, indicating that the light source is close to the sunlight, which means that the color rendering is close to the sunlight; Then the subject also talked about the eye protection lamp. My personal understanding is that the color rendering index of the light source is close to 100, which only means that the secondary light source basically restores the original color of the object. At the same time, the light source is close to the sunlight, which can achieve the function of not damaging the eyes.

First of all, what is the concept of Xianzhi 97: if we only talk about Xianzhi, it‘s almost perfect!

Theoretically, the highest index is 100. At present, the principle of thermoluminescence can reach 100! The sun, incandescent lamp and so on can achieve 100‘s indication! In other luminescent principles, the color rendering index can only be as close as possible to 100~

The color rendering index of LED classroom lamp can be 90, which indicates that the manufacturer has made great efforts to display this parameter! Manifesting is a parameter that can directly affect the comfort of human eyes under long-term observation! The most obvious example of the influence of too low a finger on the human eye is the feeling that we entered the clothing shop with poor lighting conditions. After that, we found that the color of the clothing store is different from that in the sun.

The human eye is in the environment of low index for a long time, and the human eye is constantly adapting and correcting, which does great harm to the human eye!

Secondly, to say a little bit more broadly, you can‘t just look at the parameter of indicator when choosing eye protection lamp. You should pay attention to the comprehensive performance of spectrum, glare, stroboscopic, Photobiological Safety, etc!