BPs don't really need extra lighting. Maybe you could try one of the ceramic "bulbs" on a dimmable fixture like this
http://www.amazon.com/gp/product/B00...ilpage_o00_s00

http://www.amazon.com/gp/product/B00...ilpage_o00_s00

Then you would be able to get temps up and not have to worry aabout lights causing stress.
What kind of cage is your BP in?