Colour Rendering Index (CRI)

color rendering index (CRI) is a quantitative measure of the ability of a light source to reveal the colours of various objects  in comparison with a natural light source such as sunlight. The higher the CRI the better.

Numerically, the highest possible CRI value is 100 and would only be given to a source identical to standardized daylight or a black body (incandescent lamps are effectively black bodies)

Typical LEDs have about 80+ CRI, although CRI 90+ LEDs are becoming available.

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