A quick note – for those who need to work the PC later at night, flux is something to check out. The basic function is to change the color temperature your monitor is set at over the course of the day/night. At night it is set to a lower temperature – which helps keep your brain from thinking “oh, this light is daylight and it is not the time to sleep”.
For more, hit up their website: flux
(note: software is available for Windows, Mac, Linux)
I have been using Flux for a week or more now and have decided I like it. I did adjust the night setting so it does not get as muted. At first it bugged me to have the screen dim, but now that I am used to it, I seldom notice. When I think about it I have brought the screen up to full brightness to see the difference, and the bright screen is too glaring. Pretty useful program.