http://stereopsis.com/flux/ <-- It changed my life. (Automatically adjusts screen brightness/color/etc such that your circadian rhythms resemble that of a normal human being as opposed to someone who stares at an artificial sun for 16+ hours a day.)
Everybody should try a program like this, during the night/evening it is so much better then the normal color configuration!
Set it to slow transition, then you really don't notice it. (FWIW i use 3700K at night). This along with the rear-based lighting from the article is so much better to look at.