Depends on what I'm doing at the time. I would hate to run into the coffee table or trip over the dog in the middle of the night because of no lights on. However when I'm in bed I prefer them off or dimmed quite a bit.
It depends on situation. If it is dark outside or it's night i prefer the lights turned on. But if outside is bright and shining i prefer to close the light cause it harms my eyes. Now it depends on the person and it's preferences. Good luck!