For an infant, do you do naps where it is t totally dark and quiet, to get them used to some background noise, even if it means a shorter nap, or put them in a darkened room with white noise to get the longest nap you can?

I'm torn but since C is a pretty crappy napper, so I have been putting her in her room with the white noise. The room is dim but not black. I don't know if I'm setting up bad habits though. She's 5 weeks old.