Providing highly consistent LED color-matching capabilities, TT electronics OPTEK Technology now offers multi-chromatic tuned light engines. OPTEK’s chromatic tuning process produces solid-state lighting solutions with remarkable module-to-module consistency, such that differences in color temperature of each light engine are indistinguishable to the human eye. The standard measure for distinguishing between differing chromaticity is the 4-step MacAdam’s ellipse. A reference chromaticity point on MacAdam’s 1931 correlated color temperature (CCT) chart represents a given color value, and a 4-step ellipse around that point indicates color variations that are indistinguishable to the human eye.