I'm not confusing them... UVB100 is actually a 5% and ff you put a the lower 2% UVB over screen you actually do nothing for your frogs but provide them light, as the UVB is halved and unusable. I think this is why Exo Terra changed their UVB bulbs names. The exact % of UVB required actually depends on the size of the tank and cannot be determined solely on that 'this' UVB should always be used for this animal. What you need to know is the uv gradients needed throughout the tank for the species. If you use a too low percentage UVB you don't provide the right UVB gradients which they need. It's similar to that if you were using a heat lamp, Oviously larger tanks will require more wattage than smaller to provide the right temps. As they are arboreal they can use the height and size of the enclosure to regulate the exposure effectively.





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