I'm so sorry to hear that he's not getting better but is just getting worse. This has nothing to do with lights but it's a direct result of the treatment. You should be documenting the way that your dragon has gone downhill since the unqualified vet caused this health decline. If there is a liver problem sometimes milk thistle may help. I don't know what else to say except to let this vet know what he did and see about a refund and giving a review on their website with a warning because they obviously don't know how to treat reptiles and they may be harming others. Still try to get fluids + the probiotocs in him, mostly fluids though. If there's any food he'll lick at, give that to him.....baby food squash, green bean and even try raw honey, unpasteurized.