Light temperature
The color temperature of a light source is the temperature that a black body would have to have in order to produce the same color impression as the light source.
The temperature is given in degrees Kelvin, where °K=°C+273. A similar color temperature of 3000°K represents a warm reddish light color, whereas 6000°K describes a cold color similar to daylight.
to
1900°K
candlelight
up to 3300°K warm white
2200°K to 3400°K incandescent lamps
above approx. 3900°K fluorescent lamps
up to 5000°K neutral white
5100°K to 5400°K midday sun in summer
5900°K to 6400°K overcast sky in January
6500°K Xenon test lamp (standard light C)
6500°K overcast northern sky
5000°K to 6800°K daylight white
9900°K to 11500°K blue midday sky in December
Color temperature is a measure of the color impression of a light source. The unit of color temperature is Kelvin (K).