My ball python is in a cage against the wall across the room from the one window in this room. Some afternoon sun can brighten the room through the blinds a little bit, but it's generally dim in here. I have a floor lamp on a timer that's on for a little bit in the morning, a little bit in the middle of the day, and most of the evening until about eleven or midnight. I have a fluorescent fixture above her cage, but I only remember to turn on that light about one or two days a week. A few nights each week, I'm in the room past midnight with at least some light on.
I'd say that the room is dim or dark most of the time, but there are some light periods. The opening to her favorite hide is turned 90 degrees to most sources of light, so the light doesn't shine into the hide. She can also use other hides that stay dark.
She eats very steadily except when she's in blue before a shed. She's grown slowly, but I believe that problem is a result of my underfeeding her slightly when she was younger. Her switch to rats seems to have precipitated a growth spurt.
I don't know whether any of this data helps, but I appreciate your asking these questions and looking at the data. I hope you're going to write another paper for your website. Your site is a good resource to the ball python community.
Thanks,
Bill
-----
It's not how many snakes you have. It's how happy and healthy you can keep them.