<P> The color temperature of a light source is the temperature of an ideal black - body radiator that radiates light of a color comparable to that of the light source . Color temperature is a characteristic of visible light that has important applications in lighting , photography , videography , publishing , manufacturing , astrophysics , horticulture , and other fields . In practice , color temperature is meaningful only for light sources that do in fact correspond somewhat closely to the radiation of some black body , i.e. , those on a line from reddish / orange via yellow and more or less white to blueish white ; it does not make sense to speak of the color temperature of , e.g. , a green or a purple light . Color temperature is conventionally expressed in kelvin , using the symbol K , a unit of measure for absolute temperature . </P>
<P> The color temperature of a light source is the temperature of an ideal black - body radiator that radiates light of a color comparable to that of the light source . Color temperature is a characteristic of visible light that has important applications in lighting , photography , videography , publishing , manufacturing , astrophysics , horticulture , and other fields . In practice , color temperature is meaningful only for light sources that do in fact correspond somewhat closely to the radiation of some black body , i.e. , those on a line from reddish / orange via yellow and more or less white to blueish white ; it does not make sense to speak of the color temperature of , e.g. , a green or a purple light . Color temperature is conventionally expressed in kelvin , using the symbol K , a unit of measure for absolute temperature . </P>
what is the k rating of a light bulb
what is the k rating of a light bulb
absolute temperature
absolute temperature