Light Source Temperatures

http://photo.net/learn/optics/edscott/cf000030.htm

Tungsten standard service bulb 2600 – 2800 °K Projector lamps 3200 °K Photoflood 3400 °K Flashbulb clear 4000 °K Electronic flash 5000 – 6000 °K Daylight 5500 °K Overcast daylight 7500 °K North sky no shadows 10,000 – 20,000 °K