With light? Or in the dark?
It hurts your eyes if they are off. So I have them on.
Lights should be on, better for your eyes and further vision
In short lights off. This is because there is less glare and lower strain is required of your eyes.
Lights off Pro: more focus Con: possible eye pain once you're done Lights on Pro: less eye pain Con: possible glare less focused Personally I play with lights off
