It really is one of those debatable things if they require UVB or not.
I tossed in a UVB 5% on my banded gecko, and she is never out during the day. I figured I had a two-socket light. I might as well use both sockets.
On the crestie, I want to try UVB along with the Jungle Dawn because it is not hiding as much as the banded. Sure it takes me an hour to find the little thing in the leaves and stuff, but it moves around slightly. I figured a low UVB like this couldn’t hurt. It might be a waste of money, not sure.