A 5.0 UVB is considered a tropical one; kind of middle range in reptile terms. There are no established guidelines in regards to UVB bulbs and frogs; they will survive fine without them. Still, some owners report their frogs do better under UVB use. As long as the enclosure parameters are fine and you provide an 85F basking spot; the 5.0 UVB won't hurt them. Good luck !