The color is more closed to blue, the temperature is higher, and closed to red, the temperature is lower. The light color of the sun also changes over time in a day. 40 minutes after the sunrise, the light color is yellow and the CCT is 3000K; before the sunset, the light color slants red and the CCT decreases to 2200K. Other luminaires of correlated color temperature, because that CCT in fact is the value of light color performance of the luminaires when the blackbody radiation is closed to the color of luminaires, not a precision comparation of color, so with the same CCT of two luminaires, which may be same difference in the light color appearance. Only CCT can not understand the capacity that luminaire is to object, or reproductivity that object color is in the luminaire.
Correlated color temperature in different luminaires environment:
The northern sky: 8000-8500K
Cloudy day: 6500-7500K
The summer sunlight at noon: 5500K
Metal halide lamp: 4000-4600K
Sunlight in the afternoon: 4000K
Light cool color camp: 4000-5000K
Light warm color lamp:2500-3000K
Halogen lamp: 3000K
Tungsten lamp: 2700K
The candle light: 2000K
The correlated color temperature of luminaire is different and the color of light is also different. CCT below 3300K has the modest atmosphere and warm feeling; CCT between 3000K and 5000K is the medium CCT, with a cool feeling; CCT up to 5000K has cold feeling. Different color in different light source composed of the best environment.