Color Temperature - Kelvin

Color Temperature of a light source is the temperature of an ideal black-body radiator that radiates light of a color comparable to that of the light source. Kelvin is a unit of measurement used to describe the hue of a specific light source. This is not necessarily related to the heat output of the light source but rather the color of the light output. The higher the Kelvin value of the light source, the closer the light's color output will be to actual sunlight.