Correlated Color Temperature is usually expressed in Kelvin’s of a blackbody radiator that most closely resembles the color of a stimulus of equal brightness.
|Candle flame, sunset/sunrise|
|Soft (or Warm) White compact fluorescent lamps|
|Studio lamps, photofloods, etc.|
|Studio "CP" light|
|Horizon daylight, tubular fluorescent lamps or cool white/daylight
compact fluorescent lamps (CFL)
|Vertical daylight, electronic flash|
|Xenon short-arc lamp|
|LCD or CRT screen|
|Clear blue poleward sky|
Below 3300K – Warm, Healthy; Suit for home, bedroom, hotel, and can make the red more vivid.
3000K to 6000K – Neutral color, Pleasant, Comfortable; Suit for Shops, Hospitals, Offices, Hotels, Restaurants.
Over 5300K – Bright, Make people focused; Suit for Office, Conference Rooms, Classrooms, Reading room.