If you’re like me, you should have noticed that Mac screens are really bright. This is especially obvious on my early–2007 iMac where, even during the day, I set the screen brightness to the minimum. Since I’m already at the minimum, at night, it is definitely too much bright.

Staring in front of a computer screen that bright is a bad thing for your sleep. OS X provides a built-in but often underused way to adapt your monitor, called the Night Vision Mode: simply press Cmd-Option-Ctrl-8 to invert screen colors. If you’d like to experience more subtle ways to manipulate your screen brightness, read on to find out some clever apps.

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