I really appreciate discussion on this topic. There isn't much research done on amphibian care and nutrition. For years, I was under the impression that amphibians did not need UVB or for that matter any type of lighting. My experiences at the zoo proved me wrong. Obviously, some species of frogs and toads are nocturnal and probably do not need special lighting. Others, like FBTs are diurnal and active during daylight hours. Any animal active during the day is going to receive some UVB from the sun. The right amount of UVB along with vitamins and minerals will protect the from from Metabolic Bone Disease and Short Tongue Syndrome, the inability to use the tongue to capture prey. Also, some frogs available in the pet trade may need basking or hot spots. Some species of Chironantis and Phyllomedusa have been known to bask in direct sunlight as air temperatures exceed 100 degrees(F). Frog keepers need to understand the natural behaviors of their frogs or toads and provide for them accordingly. I believe that UVB should be used in terrariums housing daylight active amphibians.