The Kelvin Temperature Scale


The following table shows the correlated colour temperature of common light sources:

Color Temperature Light Source
1000-2000 K Candlelight
2500-3500 K Tungsten Bulb (household variety)
3000-4000 K Sunrise/Sunset (clear sky)
4000-5000 K Fluorescent Lamps
5000-5500 K Electronic Flash
5000-6500 K Daylight with Clear Sky (sun overhead)
6500-8000 K Moderately Overcast Sky
9000-10000 K 


Shade or Heavily Overcast Sky 


Here is a visual representation of the Kelvin temperature scale. Notice how lower temperatures are very warm, and following the color spectrum, increase in numeric value as they become cooler.

PDF: The Kelvin Temperature Scale