I'm no expert what so ever, but frogs rarely (if never) need UVA and UVB even less. A 5.0 UVB light sounds really unneccesary and potentially dangerous to me. If you want a CFL bulb that provide plant growth and still is harmless to the frogs, I would use Exo-terra's UVA with the lowest percentage of UVA, which is the 2.0. However, a daylight CFL from Lowes or Home depot works as well both as a light source and to stimulate plant growth. What the plants really want is a broad spectrum of light and the right light-temperature, not necceaarly the UVA.