【Lighting Knowledge】Correlated Color Temperature (CCT)
Jun 29, 2016

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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.


      Temperature                Source
1,700 K    
Match flame
1,850 K    
Candle flame, sunset/sunrise
2,700–3,300 K    
Incandescent lamps
3,000 K    
Soft (or Warm) White compact fluorescent lamps
3,200 K    
Studio lamps, photofloods, etc.
3,350 K    
Studio "CP" light
4,100–4,150 K    
5,000 K    
Horizon daylight, tubular fluorescent lamps or cool white/daylight
compact fluorescent lamps (CFL)
5,500–6,000 K    
Vertical daylight, electronic flash
6,200 K    
Xenon short-arc lamp
6,500 K    
Daylight, overcast
5,500–10,500 K    
LCD or CRT screen
15,000–27,000 K    
Clear blue poleward sky

Actuality Application:

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.