What is Color Temperature?

Correlated color temperature (CCT) describes the apparent coolness or warmness of a light source relative to a reference temperature. The higher the CCT, measured in Kelvin (K), the cooler the lamp will appear. Lamps with CCT greater than 4500 K are considered cool and may appear to have “blueish” white light. Conversely, the lower the color temperature, the warmer the light will appear. Incandescent lamps typically have a very warm CCT of approximately 2700 K (warm yellow-red similar to a late evening sunset).