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Is there any way to lower the brightness further than the minimum brightness setting? I would like to not have my retinas burned at night.

If there is no solution to lowering the backlight, then is there some magic formula in which I can change the gamma/brightness/contrast values without totally messing up my ability to differentiate between #333333 and #000000? (i.e. not let black and dark gray look like they're both totally black)

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See also: superuser.com/questions/191614/… –  muntoo Aug 3 '12 at 7:40
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