When the standard black body is heated to a certain degree, the color starts to change gradually from dark red-light red-orange-white-blue. When the color of the light emitted by the light source is the same as the color radiated by the black body at a certain temperature, the temperature of the black body is called the color temperature of the light source, expressed by the absolute temperature K (Kelvin).
The light source with a color temperature below 3300K is reddish in color, giving people a warm feeling.When the color temperature exceeds 5300K, the color tends to be blue, giving people a cool feeling.Generally, in areas with higher temperature, people mostly use light sources with color temperature higher than 4000K, while light sources below 4000K are more frequently used in areas with lower temperature.
