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Light bulb colors are measured in kelvins, the scientific unit of measurement for thermodynamic (heat) temperature.A lower kelvin measurement indicates that the light is warmer and more orange in ...
An incandescent lamp's light is thermal radiation, and the bulb approximates an ideal black-body radiator, so its color temperature is essentially the temperature of the filament. Thus a relatively low temperature emits a dull red and a high temperature emits the almost white of the traditional incandescent light bulb.
Date/Time Thumbnail Dimensions User Comment; current: 13:57, 27 July 2017: 1,324 × 586 (21 KB): Burninthruthesky: Typo: "Wite" -> "White". 20:59, 25 September 2009
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Color temperatures and example sources Temperature Source 1700 K Match flame, low pressure sodium lamps (LPS/SOX) 1850 K Candle flame, sunset/sunrise: 2400 K Standard incandescent lamps: 2550 K Soft white incandescent lamps 2700 K "Soft white" compact fluorescent and LED lamps 3000 K Warm white compact fluorescent and LED lamps 3200 K
The kelvin is often used as a measure of the colour temperature of light sources. Colour temperature is based upon the principle that a black body radiator emits light with a frequency distribution characteristic of its temperature. Black bodies at temperatures below about 4000 K appear reddish, whereas those above about 7500 K appear