HOWDY---Question which comes directly from my experience? I notice the power sun does the UVB very fine, and no arguement on that issue, but as far as heat. in a 40 watt cage the basking under this bulb is somewhere in the high 80's or low 90's which is not enough heat for many of the reptiles people keep. While I use a 100 watt bulb as well (T-Rex) I almost always use another bulb as light intnisty is just as important to reps as UVB in overall health. So I have found the power sun not to provide the level heat that the T-rex produces, maybe you can address this, maybe I am mistaken-but this seems to be what I have observed. So while I don't want to put down the power sun and I have used them in the past many times, I am still very partial to the T-Rex bulb because it indeed puts out the UVB and appreciable heat which seems to work best for me. Also the 7% is absolutely fine as a flourescent but you need to make sure that it is less than 10 inches off the substrate. THats one reason why I use the zoomed 10.0 screw-in flourescent on the cool side of the cage in tandem with a zoomed standard basking bulb, and the screw-in 10.0 can be higher off the substrate and still do an excellent job. They are inexpensive and screw into a standard 10" lamp holder........Cheers!!!
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