What is the color temperature of common light sources, such as incandescent lamps?

The common light source is natural light: mainly refers to sunlight, and its color temperature is 5500k K K.

The light color of incandescent lamp is warm white, and its color temperature is 2700K-2800k, and the color is yellow. The color temperature of fluorescent lamp is 6000 k; The daytime color temperature is 8000K (dusk) ~ 17000 K (noon); The color temperature of tungsten lamp is about 3200k K.

Color temperature is a physical quantity used to define the color of light source in illumination optics. That is, when a blackbody is heated to a certain temperature, and the color of the light it emits is the same as that of the light source, the temperature at which the blackbody is heated is called the color temperature of the light source, or color temperature for short. Its unit is represented by "K".

According to this principle, the color temperature of any light is equivalent to the "temperature" when the black body emits the same color. Color is actually a psychological and physiological function. All color impressions are caused by intermittent spectral reactions on the eyes, so color temperature is only used to express the visual impression of color.

Extended data:

Different color temperatures of light sources bring different feelings. Under the irradiation of high color temperature light source, if the brightness is not high, it will give people a cold feeling; Under the irradiation of low color temperature light source, too high brightness will give people a sultry feeling. The lower the color temperature, the warmer the color tone (reddish); The higher the color temperature, the colder (bluish) the hue.

Color temperature is an important feature of visible light in photography, video recording, publishing and other fields. The color temperature of the light source is determined by comparing the color of the light source with the theoretical hot blackbody radiator. The Kelvin temperature when the hot blackbody radiator matches the color of the light source is the color temperature of that light source, which is directly related to Planck's law of blackbody radiation.

References:

Baidu encyclopedia-color temperature