The relationship between color rendering index and color rendering
When there is little or lack of the main wave reflected by the object under the reference light source in the light source spectrum, it will cause the color to produce 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 (Kau fman) is still a common method for defining the color rendering properties of light sources.
The color rendering index of incandescent lamp is defined as 100, which is regarded as an ideal reference light source. This system uses 8 standard color samples with medium chroma to test, compare the deviation degree of the 8 colors under the test light source and the same color temperature benchmark, to measure the color rendering index of the light source, and take the average deviation value Ra20-100, with 100 being the highest, the larger the average color difference, the lower the Rr value. Light sources below 20 are generally not suitable for general use.
Index (Ra) Grade Color rendering General application
90-100 1A Excellent Places where precise color contrast is required
80-89 1B Good Places where correct color judgment is required
60-79 2 Normal Places requiring medium color rendering
40-59 3 Not good Places with low requirements for color rendering and small color difference
20-39 4 Poor Places with no specific requirements for color rendering
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