What is the color temperature of the photographic light bulb?

Color temperature is used to quantitatively describe the physical quantity of light (except colored light). It means that when the light color of a light source is exactly the same as that of a complete radiator at a certain temperature, the temperature of the complete radiator is called the color temperature of the light source. The symbol is Tc, and the unit is K. When the light color of a light source approaches the light color of a complete radiator at a certain temperature, the temperature of the complete radiator is called the correlated color temperature of the light source. The symbol is t and the unit is K. ..

Incandescent lamps and other light sources emit a continuous spectrum, and blackbody is also a heat radiation source and also emits a continuous spectrum, so the light color of this light source can be completely consistent with a complete radiator at a certain temperature. The gas discharge light source such as color temperature lamp is used to describe this light source, and its luminous principle and spectral radiation energy distribution are different from those of blackbody. The white light of LED is white light that only emits when the blue chip excites the phosphor. Blue chip is not continuous spectral radiation-the light color of this light source cannot be exactly the same as that of a complete radiator at a certain temperature, but only the closest, so it is described by the correlated color temperature. In practical use, the "correlated color temperature" of gas discharge light source is often referred to as "color temperature" for short.

Simply put, the higher the color temperature of the bulb, the closer the luminous color is to blue, and the lower the color temperature of the bulb, the closer the luminous color is to red.