There are a lot of applications out there for your PC and smartphone that would make your life so much easier, but so few get the recognition they deserve. I bring you f.lux. It’s a small program that does only one thing – dims your screen as the day turns to night. But it doesn’t simply darken the screen. It changes the display color settings to the best preset for your environment. That’s great because when it’s late at night, you won’t get that bright white glare that makes you squint your eyes, lower the brightness on your screen, or distance yourself from the monitor.
If you want better information on the why and how, check out their research articles.