Hi dan

Of all the millions of horned frogs kept, most are probably kept without a UVB light and they do well as UVB is not in the husbandry of most books on horned frogs or general information. Because horned frogs have a wild diet that includes a lot or solely vertebrates ( C. Cornuta feeds on frogs) D3 can provided by the diet as D3 is in the liver of vertebrates. It's unknown if they will partly use UVB and until studies are done on this species any suggestions that it is necessary in this species is anecdotal. It is a good idea to use a UVB for non albinos if you can provide plenty of plant cover and shelters as a this will work as a back up should you by mistake not supplement enough with D3. Many brands that sell UVB lights are claiming that they need it but their opinions are biased. Small frogs like dart frogs, fire bellied toads, most true ranid frogs and many small and large tree frogs frogs should be provided with UVB because they are mostly insectivores or high baskers. You will need to provide your frog with a day and night cycle, though.

Pulse thermostats are best with heat mats and you can place the probe under the substrate on top of heat mat. You can also use the day/night pulse ones with a ceramic heat emitter. The dimming the are the only suitable to use with bulbs. The probes are bulky and annoying in most thermostats.