Color Temperature

Color temperature is a characteristic of visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, horticulture, and other fields. The color temperature of a light source is the temperature of an ideal black body radiator that radiates light of comparable hue to that of the light source. In practice, color temperature is only meaningful 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 stated in the unit of absolute temperature, the kelvin, having the unit symbol K.

Color temperatures over 5,000K are called cool colors (blueish white), while lower color temperatures (2,700–3,000 K) are called warm colors (yellowish white through red). This relation, however, is a psychological one in contrast to the physical relation implied by Wien's displacement law, according to which the spectral peak is shifted towards shorter wavelengths (resulting in a more blueish white) for higher temperatures.

Read more about Color TemperatureCategorizing Different Lighting, Correlated Color Temperature, Color Rendering Index, Spectral Power Distribution

Other articles related to "color temperature, color":

Metal-halide Lamp - Color Temperature
... lamps are now available with a correlated color temperature from 3,000 K to over 20,000 K ... Color temperature can vary slightly from lamp to lamp, and this effect is noticeable in places where many lamps are used ... Because the lamp's color characteristics tend to change during lamp's life, color is measured after the bulb has been burned for 100 hours (seasoned) according to ...
Compact Fluorescent Lamp - Comparison With Incandescent Lamps - Spectrum of Light
... CFLs emit light from a mix of phosphors inside the bulb, each emitting one band of color ... Modern phosphor designs balance the emitted light color, energy efficiency, and cost ... phosphor added to the coating mix improves color rendering but decreases efficiency and increases cost ...
Marine Aquarium - Modern Fishkeeping - Lighting - Overall Lighting Considerations
... aquarium, there are generally two factors to consider wattage and color temperature ... Wattage, while not indicative of color, is equivalent to power and essentially determines how brightly the light will shine ... Color temperature, measured in kelvins (albeit slightly unrepresentively) refers to the color of light being emitted by the lamp and is based on the concept of blackbody radiation ...
Mired - Examples
... A blue sky, which has a color temperature T of about 25,000 K, has a mired value of M = 40 mireds, while a standard electronic photography flash, having a color temperature T of 5000 K, has ... In photography, mireds are used to indicate the color temperature shift provided by a filter or gel for a given film and light source ... natural light (say, 5700 K) without introducing a color cast, one would need a corrective filter or gel providing a mired shift of This corresponds to a color ...

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