Lights on or off?

[Prowler]

So it recently came to my attention that many people like to play games with their room lights turned off. This is a bit surprising to me, since I recall those health warning booklets that come with games advising you to play games in a well lit room.

So, I'm guessing for some people lights out makes the experience seem more cinematic?

I play with lights on, always. I don't want to tire my vision too quickly.