Traditional Culture Encyclopedia - Photography major - What is warm light?
What is warm light?
Warm light refers to lamps that use warm colors as light sources. Generally, light sources with a color temperature of around 2700K are so-called warm lights.
Definition of color temperature: When the spectral distribution of the light emitted by a certain light source is the same as the spectral distribution radiated by a non-reflective, opaque black body that completely absorbs light at a certain temperature, we refer to the absolute The temperature of the black body is called the color temperature of this light source.
Color temperature is the most common indicator of the spectral quality of a light source. Color temperature is defined by an absolute black body. When the radiation of the light source is exactly the same as the radiation of the absolute black body in the visible region, the temperature of the black body is called the color temperature of the light source.
The characteristic of low color temperature light sources is that there is relatively more red radiation in the energy distribution, which is usually called "warm light"; when the color temperature is increased, the energy distribution is concentrated and the proportion of blue radiation increases, which is usually called "warm light". "cold light". The color temperatures of some commonly used light sources are: standard candlepower is 1930K (Kelvin temperature unit); tungsten lamp is 2760-2900K; fluorescent lamp is 3000K; flash lamp is 3800K; noon sunlight is 5400K; electronic flash lamp is 6000K; blue sky is 12000-18000K.
When discussing the issue of lighting in color photography, photographers often mention the concept of "color temperature". What exactly does color temperature refer to? We know that the light usually seen by the human eye is composed of the spectrum of 7 colors of light. But some of the light is bluish and some is reddish. Color temperature is a method specifically used to measure and calculate the color components of light. It was created by Lord Kelvin, a British physicist at the end of the 19th century. He developed a complete set of color temperatures. Calculation method, and its specific determination standard is based on the wavelength emitted by a black body radiator.
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