Both of you, Finn and Denverbug, should take your little guys to the vet. Chameleons are masters of hiding illness until one day they keel over in their cages, so I would not be complacent about napping throughout the day. It may mean they are fighting an infection and they are tired/weak/uncomfortable, for example, or something else is going on. But I'd have a professional take a look at them.
Finn, if he's sleeping during the day when you just got him probably means he came to you already in poor shape. 2 days without UVB would not cause a problem so quickly. Could you make a new thread and tell us about where you got him from and how you're housing him, please? And we'll help where we can.