I use the sun as well. Unlike other types of reptiles ball pythons do not need specific types of UV bulbs or anything like that. They do perfectly fine with a day and night cycle coming from the lighting in the room and from the sun. My ball python is in the bedroom and I open up the shades during the day so that the sun comes in, then at night the room stays nice and dark from the sun going down. This has worked very well so far for my ball python. Hope this helps!![]()