A specification of the color appearance of a light source, relating its color to that of a blackbody radiator, as measured in Kelvins (K). CCT is a general measure of a lamp’s “coolness” or “warmness.”

According to 10 CFR 430.2 [Title 10 – Energy; Chapter II -- Department of Energy; Subchapter D -- Energy Conservation; Part 430 -- Energy Conservation Program for Consumer Products; Subpart A -- Gener [..]

the apparent/perceived color of a light source compared to the color appearance of an ideal incandescent light source at a particular temperature, expressed in degrees Kelvin (K). The CCT rating is an [..]

See color temperature

Indicates how warm/cool light is. CCT is measured in Kelvin (K). Higher values (>5,000K) indicate a cooler/bluer light color; lower values (<4,500K) indicate a warmer/more orange light color.

The temperature of the surface of an ideal black body radiator measured in Kelvin (K), which ranges from warm (i.e., red to yellow, generally 3000K and below) to cool (i.e., blue, generally 5000K and [..]

A specification for white light sources used to describe the dominant color tone along the dimension from warm (yellows and reds) to cool (blue). Lamps with a CCT rating below 3200 K are usually considered warm sources, whereas those with a CCT above 4000 K usually considered cool in appearance. Temperatures in between are considered neutral in app [..]