For UVB, ReptiSun 5.0 is used successfully by many members on here. I hear that Arcadia brand is good too, however, I have no experience with it. For basking, you can use any regular household incandescent bulb. 60w is a good starting point and you can increase or decrease the wattage depending on the temperature. I personally don't think that using the Powersun is a good idea. 100w is very hot and would need to be in order to get sufficient UVB output. I do not have any personal experience with this, though, so I don't know if it would be successful.