Since BP's are better off with belly heat to warm them than an over-head heat source, and UTH (such as reptile heat mats and flexwatt) don't emit light of any kind, it sounds like switching over is the best thing for you -and- your snake.

BPs like belly heat to aid digestion

That being said, if you're going to pick up a belly heat (UTH) source at the reptile show, see if you can pick up a thermostat (Ranco, Johnsons, Helix or Herpstat) while you're there--as UTH should be controlled by a thermostat to prevent belly burns.

I'm sure an UTH will make both you and your BP happier!