The color rendering index of the led light means: the ability of the color rendering of the LED light source.
There are two types of color rendering:
1. Faithful color rendering
A light source with a high color rendering index (Ra) must be used to correctly express the original color of the substance, and its value is close to 100, and the color rendering is the best.
2. Effect color rendering
To sharply emphasize a specific color, and express the beauty of life, you can use the method of additive color to enhance the color rendering effect. Using a low color temperature light source to illuminate can make the red more vivid; using a medium color temperature light source to illuminate, so that the blue has a cool feeling; using a high color temperature light source to illuminate, make the object feel cold.
When there is little or lack of the main wave reflected by the object under the reference light source in the light source spectrum, the color will have an obvious color shift. The greater the degree of chromatic aberration, the worse the color rendering of the light source. The color rendering index coefficient is still a common method to define the color rendering of a light source.
The color rendering index of sunlight is defined as 100, and the color rendering index of incandescent lamps is very close to sunlight, so it is regarded as an ideal reference light source. This system uses 8 standard color samples with medium chroma to test, compares the deviation degree of the 8 colors under the test light source and the standard of the same color temperature, to measure the color rendering index of the light source, and take the average deviation value Ra20-100 , 100 is the highest, the greater the average color difference, the lower the Ra value. Light sources below 20 are generally not suitable for general use.
