Color Temperature
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The temperature at which a blackbody emits radiant energy competent to evoke a color the same as that evoked by radiant energy from a given source (as a lamp). Measured in Kelvin degrees (K), important to photographers to understand how light changes and film records it and to filter it to fit the film in use. In digital photography the light conversions/adjustments can be made via software. Average noon daylight has a color temperature of 5500K. A common tungsten house light bulb has a color temperature of 2800K. Tungsten studio lamps 3200K and photo lamps or photofloods 3400K.
