Name : Color rendering 

Unit ：Color Rendering Index (CRI)

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It is generally believed that the artificial light source should make the human eye right to perceive the color, just as in the sun to see things the same. Of course, this depends on the application of the occasion and the purpose of the different requirements. This indicator is the color of the light source characteristics, known as the "average color rendering index ((Ra). The average color rendering index for the object in a light source to display the color and its reference light source under the color The difference between the two, the value of the assessment method for the reference light source and the light source to be measured according to DIN 6169 of the eight color samples on a comparison and quantify the difference; the smaller the difference, that represents the test The better the color rendering of the light source, the average color rendering index Ra of 100 light source can make a variety of colors appear as a reference light source by the color.Ra value is lower, the rendering of the color distortion.

Due to the different types of light sources, the colors of the objects you see are also different. Affect the color of the nature of the light source known as the color of color, the general can be said that the color of good light color vision is good, and poor color rendering color difference is also poor.

The average color rendering degree of the main light source (Ra)
Fluorescent light three wavelengths 80
Fluorescent white 65
Daylight daylight color
Color evaluation with 99
Mercury bulb 40
Highly colored complex metal lamp 90
Halogen bulb 100
Light bulb 100