I have followed a training in France for Herpetology and breeding of Reptiles and Amphibians in captivity.
Believe me, some UVB's can help a lot to avoid in MBD, because vit D3 can be toxic if you give to much.
So, I would put a full spectrum light to simulate real day light (With a color temperature of 6500K, as fluorescent tube for aquarium for example), I would use a basking spot (tungstene) for heating (Basking spot creates 95% Infra red so only heating and have a color temperature of roughly 2000K...It means they only simulate light of end of the day....) and I would add some UVB's during some hours per week...All frogs, especially Pyxie frogs, receive a lot of UVB's during active period in nature.
Just for information, a pet as reptile or amphibian, needs 150µW/cm² UVB's in order to use it in an efficient way for provitamin D3 synthetisis.
During this training, we have measured with UVB meter some UVB's tubes and lampa sfrom different manufacturers, and believe me, they are not all equal![]()