colour rendering index
measure of the degree to which the psychophysical colour of an object illuminated by the test illuminant conforms to that of the same object illuminated by the reference illuminant, suitable allowance having been made for the state of chromatic adaptation
Note 1 to entry: See also CIE 13
Note 2 to entry: This entry was numbered 845-02-61 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-222 and 17-263 in CIE S 017:2011.