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Enterprise NewsAbout color temperature
Hits UpdateTime:2011-07-20 15:27:20
Color temperature is a characteristic of visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, 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. Color temperature is conventionally stated in the unit of absolute temperature, the kelvin, having the unit symbol K.
|
Source
|
Color temperature
in kelvin |
|
Skylight (blue sky)
|
12,000 - 20,000
|
|
Average summer shade
|
8000
|
|
Light summer shade
|
7100
|
|
Typical summer light (sun + sky)
|
6500
|
|
Daylight fluorescent (caution!)
|
6300
|
|
Xenon short-arc
|
6400
|
|
Overcast sky
|
6000
|
|
Clear mercury lamp
|
5900
|
|
Sunlight (noon, summer, mid-latitudes)
|
5400
|
|
Design white fluorescent
|
5200
|
|
Special fluorescents used for color evaluation
|
5000
|
|
Daylight photoflood
|
4800 - 5000
|
|
Sunlight (early morning and late afternoon)
|
4300
|
|
Brite White Deluxe Mercury lamp
|
4000
|
|
Sunlight (1 hour after dawn)
|
3500
|
|
Cool white fluorescent (caution!)
|
3400
|
|
Photoflood
|
3400
|
|
Professional tungsten photographic lights
|
3200
|
|
100-watt tungsten halogen
|
3000
|
|
Deluxe Warm White fluorescent
|
2950
|
|
100-watt incandescent
|
2870
|
|
40-watt incandescent
|
2500
|
|
High-pressure sodium light
|
2100
|
|
Sunlight (sunrise or sunset)
|
2000
|
|
Candle flame
|
1850 - 1900
|
|
Match flame
|
1700
|
Different color temperatures are best for different applications. Lower Kelvin numbers mean the light appears more yellow; higher Kelvin numbers mean the light is whiter or bluer. Cool lights are generally preferred for visual tasks as they generate higher contrast. Warm lights are preferred for living spaces because they compliment skin tones and clothing better.
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