Setup is as simple as using an auto-location detection feature or plugging in your zip code, then choosing what sort of interior lighting you use. F.lux takes it from there, automatically adjusting the screen in either a quick 20 second mode or gradually at an hour's pace. Here's a quick before and after video we captured on our own setup:
F.lux is available free for Mac, Linux, Windows XP and Vista users at stereopsis.com.
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