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color rendering index, CRI

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color rendering index, CRI (In French indice de rendu des couleurs) colorimetric quality of a light source for suitability for adjustment or color matching; measure for the accuracy of a color impression obtained by the illumination of a chromatic object (test colors according to DIN 6169-2:1976) compared to a D50 reference light source: Ra = 100 – 4.6 × ΔE*ab; for color-matching booths and control station desks, an index > 90 is required; the LED technology of Just Normlicht reaches approx. 99.