I want to buy a powersun bulb for my rhinoceros iguana but im not sure which wattage to use. The basking spot is about 12-13 inches to where the bulb would be. At this distance what would be the temperature differance between the 100 watt and the 150 watt? Also is this a feasible daytime heat source? I have a 150 watt ceremic heat emitter at night.
Thanks,
Charlie


