So I've taken two BP rescues to my local trusted herp vet. She handles my own snakes as well as wild snakes/reptiles with the Wildlife Organization I volunteer with. She is pretty adamant on the whole UVB lighting thing. I was sure to mention that I've heard ad nauseum that UVB/UVA/Broad Spectrum lighting is unnecessary for BPs, and she actually said the same. While agreeing that she also has heard this, she mentioned that she can't help but think in the natural environment of the BP, they are getting at least some sunlight coming in through the branches of trees and whatnot.
With that being said, I know many of you say that there are lots of things in the wild that BPs aren't exposed to in captivity so we don't need to replicate their environments perfectly... But being that this vet is intelligent when it comes to snakes, I'm inclined to maybe give UVB a shot. As far as I know this particular type of light aids in calcium absorption, and maybe other things. Thoughts?