I use UVBs for my prasinus but I think it's unnecessary.

As long as I know, reptiles do see UV light, but I think it's mostly the UVA.

So, provided they have no UV, they don't see stuff the same colors they would in nature. And this could lead to different behaviour.

That is the only argument I can think of. But I also think it is not important to monitor lizards.

Oh.. And they help plants to grow better, if that matters..