The only one that comes w/the 5.0 bulb is the Zoo Med - the pro T 5 needs the 12% bulb = to a T 5 and the 6400k bulb is a T 5 no difference in reflectors that I know of and yes you would need the 10.0 for the stronger uvb- the 5.0 is more for aquarium usewith respects to the the reflectors does one work better than the other. also these all come with 5.0 T5 would that work or would i need to immediately need to get a 10.0 Bulb?