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E30
Reference Section
C Color Temperature
Color temperature is an objective measure of colors of light sources which are
expressed in the unit of absolute temperature (K: Kelvin). Light sources with lower
color temperatures appear more reddish, while light sources with higher color
temperatures appear more bluish.
3000 4000 5000 6000 8000 10000
[K]
1
234 890a567
Red Blue
1
Sodium-vapor lamps: 2700K
2
Incandescent/
Warm-white fluorescent: 3000K
3
White fluorescent: 3700K
4
Cool-white fluorescent: 4200K
5
Day white fluorescent: 5000K
6
Direct sunlight: 5200K
7
Flash: 5400K
8
Cloudy: 6000K
9
Daylight fluorescent: 6500K
0
High temp. mercury-vapor: 7200K
a
Shade: 8000K