I personally do not like the powersun as they are a combo uva(basking) and uvb bulb. That is just my personal opinion. I like having the two separate bulbs. The tube style uvb bulbs really brighten up the cage and are not just concentrated in one area. If they don't feel like basking, then they do not get any uvb when you use the combo. To answer your question about it getting too hot, I do not know as there are many variables like the temperature of your house and such that can effect the temps in the cage.