A main aspect of high-quality light are the color appearance of the light itself, which is defined by the correlated color temperature (CCT), and how the light influence the color appearance of objects, which is commonly called color rendition.

Color rendition can be quantified using CRI or color rendering index (CRI), or with one of several others recently developed metrics. LED light sources have the potential to achieve a wide range of color quality, based on the demands of the lighting application. However, in order to achieve high levels of color quality, there are typically cost and efficiency tradeoffs. In general, a minimum CRI of 80 is recommended for interior lighting, and LED Lighting products can easily achieve this performance.