Name: Color Rendering Index Ra
Assigned Number: 0x0009
This property represents the Color Rendering Index Ra value of the light output of a lamp or light fixture calculated in accordance with CIE standard CIE 13.3-1995 "Method of Measuring and Specifying Color Rendering Properties of Light Sources." The Ra value is the average of the color rendering indexes (indexes 1 through 8). This index value can be dependent on the operating conditions. The value reported by the property represents the Color Rendering Index at its present state.