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The Differences Between Color Rendering Index (CRI) and Ra

Data: 2016-08-11

The Differences Between Color Rendering Index (CRI) and Ra
   CRI, an extensive noun, is the acronym of color-rendering index, "显色指数"in Chinese; while Ra is the marked symbol of "General Color Rendering Index", and the average of the first eight colors' color rendering index  among the 15 colors' ones.
   CRI has 15 colors, named: R1, reddish-gray; R2,  dark yellowish gray; R3, saturated yellow; R4, moderate yellow-green; R5, pale blue-green; R6, light blue; R7, purplish blue; R8, light reddish purple; R9, saturated red; R10, saturated yellow; R11, saturated green; R12, saturated blue; R13, white skin color; R14, leaf green; R15, yellow skin color.
     Ra is the average value of the first eight colors' color rendering index, showing the color rendering of a light source.

Remarks: Message from LED Lighting Classes by Caojian

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