A color rendering index (CRI) is a quantitative metric of the ability of an artificial light source (i.e. LED, Fluorescent, Halogen, Incandescent, etc.) to accurately reveal the colors of a subject in comparison to a natural light source. A CRI of 90 means that the artificial light source is replicating roughly 90% of the visible color spectrum that the sun would produce on the same color.
LED Lighting for Art
There’s a lot to think about when it comes to lighting a museum gallery. On the technical design side, there are two main factors to consider: light color temperature, or the warmth or coolness of a light source, and the Color Rendering Index (CRI), or the system used to indicate relative color rendering ability.