17-155

CIE 1974 special colour rendering index [Ri]

measure of the degree to which the psychophysical colour of a CIE test colour sample illuminated by the test illuminant conforms to that of the same sample illuminated by the reference illuminant, suitable allowance having been made for the state of chromatic adaptation

See also CIE 13 Method of Measuring and Specifying Colour Rendering of Light Sources

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