I've honestly never seen a bp burrow. The lady that told you that was ignorant, and whoever told her what she knows was ignorant before that. Think about it this way ok? BP's are noctournal, they really don't see much light, and I would assume because they don't fancy it all too much which is the reason they stay hidden during the day, so technical a light is against their natural habitat. I wouldn't even use a light for just the day, especially if you get the temperatures good, and you can do that with a UTH.