Try and see if your local hardware store has a clamp lamp. Like this: http://www.google.com/products/catal...d=0CEEQ8gIwAQ#

It would be better than nothing. I would get a thermometer to monitor his temps, and maybe a fan. If his cool side gets above 85 you can put the fan to cool it of. Not directly into the cage. And make sure his hot side doesn't go above 95.

BPs are really sensitive when it comes to tempurature. They like to have it just right. Does he spend a lot of time in his hide? Or, does it look like he's doing a lot of wandering?