For something like this, i highly recommend
f.lux
Its a little program that changes the lighting of your screen depending on daytime, making it resemble electrical light while its dark outside.
Its a lot easier on the eyes, as well as less confusing for your body (because screen regulary emulate sunlight, which can make your body think its still daytime at night and mess up your sleeping schedule for example)
Its also has serveral additional useful functions currently in development (you can already see and use the beta
here) like making it warmer and slightly darker towards your bedtime to you help you get ready to sleep, an alert to not stay up too late, and a way to adjust the program to your ambient lighting.
Its great, and its free. Try it
