THE WATTAGE ON BLACKLIGHT INCANDESCENT LAMPS IS TOO LOW TO PUT OUT ENOUGH BTU'S(HEAT) TO BE USEFUL. CLEAR LAMPS PUT OUT MORE BTU'S THAN FROSTED, FLUORESCENT SCREW-IN BULBS DON'T WORK EITHER...THEY ARE ONLY FOR LIGHT NOT HEAT. WATTAGE IS WHAT ALWAYS MAKES THE DIFFERENCE...THE MORE WATTS, THE MORE BTU'S. ALSO, MAKE SURE U USE A REFLECTOR TO DIRECT THE LIGHT DOWNWARD. I USE A 150W HALOGEN FLOOD LAMP AND IT WORKS GREAT, NOT TOO MUCH, NOT TOO LITTLE. U CAN USE HEAT LAMPS TOO, THEY COME IN CLEAR OR RED...ITS JUST EXPENSIVE B/C OF POWER USAGE. I OWN A ELECTRICAL SUPPLY HOUSE, SO IF U NEED ANY MORE INFO...JUST ASK.
HOPE THIS HELPS,
SHAUN