Correspondence: In support of the IES method of evaluating light source colour rendition

Ashdown, I.; Avilés, G.; Bennett, L.; Burkett, R.; Choi, A.; Conway, K.; Deroos, M.; Druzik, J.; Gregory, P.; Herst, D.; Houser, K.; Innes, M.; Israel, C.; Luedtke, W.; Oberkircher, F.; Paolini, S.; Rosen, S.; Rosenfeld, S.; Royer, M.; Sanders, M.; Siminovitch, M.; Smet, K.; Stone, C.; Sundin, J.; Tonello, G.; Van der Burgt, P.; Van Kemenade, J.; Veitch, J. A.; Wei, M.; Whitehead, L.; Wood, M.

Publication

Correspondence: In support of the IES method of evaluating light source colour rendition

Publisher

Sage

Date

2015-11-20

Abstract

It is well known that the colour of illuminated surfaces can look different under different light sources. In the mid-20th century, as the diversity of light sources began increasing, the Commission Internationale de l�Eclairage (CIE) developed a metric for assessing colour fidelity called the colour rendering index, or CRI. Since 1965, CIE CRI has estimated the colour fidelity of a light source for 14 selected sample surfaces, and also an average accuracy, Ra, for an eight-sample subset.