Two compact fluorescent lights of varied color temperature: one cool and one warm.
Canon Rebel XTi, Tamron AF 18-200mm f/3.5-6.3, 1/500, F5.6, 47mm, ISO100, 2011-03-12T15:29:39-04, 20110312-192939rxt
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This work is licensed under a Creative Commons Attribution 3.0 License. Credit me as Richard X. Thripp and link here.
Richard X. Thripp at 2011-03-21T02:10:06.White balance is all relative, as is the color white. In this picture, the yellowish light is probably 3500K and the blueish light is probably 5000K. An incandescent would be around 2700K and most CRT monitors come configured to 9300K.
http://en.wikipedia.org/wiki/File:Incand-3500-5500-color-temp-comparison.png
http://en.wikipedia.org/wiki/Color_temperature
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