Power glo etc are the types of bulbs yes.
Some brands call the same thing different names.
The T5 units are sold new with no bulbs so you get to choose what you want.
I will possibly be setting up a bigger tank for my GT, JD and severum and I wont be going T5 as there wont be any plants to soak up the nitrate so I would have algae problems with strong light. That tank would have PL's or T8's.
Good luck!