F.lux: software to make your life better
You enter in your coordinates of where you live, it times when it is sunset and adjusts your computer screen so it isn't blazing into your frakkin' eyeballs at night time. It's much easier on your eyes.
Don't let it annoy you initially, stick through it and after a day or two you won't even notice. I just temporarily disabled mine and it's amazing how bright it was.