Filter
Top Products
A p p roximate Correlated Color
Te m p e r a t u re for Various Light Sourc e s
Source Degrees Kelvin
Artificial Light
Match Flame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1700
Candle Flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1850
40-Watt Incandescent Tungsten Lamp. . . . . . . . . . . . . . . . . . . . . . 2650
75-Watt Incandescent Tungsten Lamp . . . . . . . . . . . . . . . . . . . . . 2820
100-Watt Incandescent Tungsten Lamp . . . . . . . . . . . . . . . . . . . . 2865
500-Watt Incandescent Tungsten Lamp. . . . . . . . . . . . . . . . . . . . . 2960
200-Watt Incandescent Tungsten Lamp. . . . . . . . . . . . . . . . . . . . . 2980
1000-Watt Incandescent Tungsten Lamp . . . . . . . . . . . . . . . . . . . 2990
3200-Degree Kelvin Tungsten Lamp . . . . . . . . . . . . . . . . . . . . . . . 3200
Molarc “Brute” with Yellow Flame Carbons &
YF-101 Filter (approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3350
“C.P.” (Color Photography) Studio Tungsten Lamp . . . . . . . . . . . . 3350
Photoflood and Reflector Flood Lamp . . . . . . . . . . . . . . . . . . . . . . 3400
Daylight Blue Photoflood Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . 4800
White Flame Carbon Arc Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5000
High-Intensity Sun Arc Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5500
Xenon Arc Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6420
Daylight
Sunlight: Sunrise or Sunset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000
Sunlight: One Hour After Sunrise . . . . . . . . . . . . . . . . . . . . . . . . . . 3500
Sunlight: Early Morning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4300
Sunlight: Late Afternoon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4300
Average Summer Sunlight at Noon (Washington, D.C.). . . . . . . . . 5400
Direct Mid-Summer Sunlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5800
Overcast Sky. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6000
Average Summer Sunlight (plus blue skylight). . . . . . . . . . . . . . . . 6500
Light Summer Shade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7100
Average Summer Shade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8000
Summer Skylight Will Vary from . . . . . . . . . . . . . . . . . . . . . . 9500 to 30,000
N O T E :Sunlight is the light of the sun only. Daylight is a combination of sunlight plus
skylight. The values given are approximate because many factors affect color
temperature. OUTDOORS: the sun angle, and the conditions of the sky–c l o u d s ,
haze, dust particles–raise or lower the color temperature. INDOORS: lamp age (and
blackening), voltage, type of reflectors and diffusers affect tungsten bulbs–all of
these can influence the actual color temperature of the light. Usually a change of 1
volt equals 10 degrees Kelvin. But this is true only within a limited voltage range and
does not always apply to “booster voltage” operation, since certain bulbs will not
exceed a certain color temperature regardless of the increase in voltage.
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