Hello, I was wondering, how do you guys read ebooks on your pc/phone/tablet ? Black text on white background or white text on black background ? Black text on white background (when there is a lot of light in my room) or white text on black background (at night) is it good idea ? Recently I feel my eyes are going to explode after reading something on white background (only at night). I start feeling sleepy and can't focus, but when I change the background to black I feel much better. How is it for you ? Any good software you can suggest ? Thank you all and sorry if there are any mistakes.