Might have been raised before, but do you prefer to play pinball in a dark room or one lit up?
I for one prefer a lit room. I love the lights and stuff when it's dark but win an extra ball or jackpot and those flashers etc blind me and it can be game over. I find this especially true now with LEDs. So if I want to put up a good score it's lights on; for shear magic and who cares about the score, turn 'em off.