I say mine do well without heat and lights.I'm probably on the low side of optimum temps.It just seems to work for me that way.My snakes eat well,digest,and breed,so I don't "fix" what's not broken.
As far as a good website go to Subocs.com Dustin Rhoades is quite the fancier of T.P.R.'s
Also check out the link to his blog,simply subocs.
He also has written the first book of it's kind that's almost exclusively about T.P.R.'s
I recieved my signed copy last week.