Wether my snakes, wtf's, retf's, firebellies(i call em bombers), beardies, or the rest of my long list of tank babies; they all have 1 65k full spectrum(grow) and 1uvb. Recently weve slowly been replacing the 65k's with led's. Take alot less power and last oh so long, but theyre mostly for the plants. The uvb is more preferance to how you keep your critters. I noticed brighter colors and better growth rates with my snakes. Im not brave enough to keep the frogs without uvb(and the wife would KILL me if anything happened to the frogs). Still, with the right supplements, it could be possible to nix the uvb.
More preferance then anything i guess.