i've never used them before but have heard of others that do. I always used the red low wattage party bulbs when we kept them as pets in tanks and they worked great and were dirt cheap.
I have used various nocturnal bulbs in the past for different herps, It should be fine for leos, its not bright so wont stress them. You should have a UTH for the main source of heat, lights can be used for additional heat.