CRI stands for Color Rendering Index, which is a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully in comparison with a natural or standard light source. The CRI of a light source is determined by its spectrum, and it does not indicate the apparent color of the light source, which is given by the correlated color temperature (CCT) . The CRI is measured on a scale from 0 to 100, with higher values indicating better color rendering capacity. A CRI of 100 shows the true colors of the object, while a CRI of 80 to 90 is regarded as good and those with a CRI of 90+ are excellent. The CRI is independent of color temperature, which is a different metric that measures the color appearance of light. The CRI is used to measure the ability of a light source to accurately reproduce the colors of the object it illuminates, and it is important for applications such as photography, retail store displays, grocery store lighting, art shows, and galleries.