Day Naps - Dark Room or Light Room?

What are we supposed to be doing? My little guy is 5 weeks old today and honestly we are all over the place but would love to know what’s actually recommended/worked well for you guys? He sleeps the best in a dark room (obviously) but then I don’t want to mess up his circadian rhythm / be trapped to always need to nap in a dark room? Sigh 🫠