Hey,
Well, chances are, the uvb bulb won't start working that quickly. The best thing for you to do, as others were saying, if to bring the little guy to the vet. I have had vet bills well over $400, but in your situation, I wouldn't imagine it going over $150. But, anything is possible.
In my opinion, there are probably one of two reasons that your cham is heading down hill. First, it might be an upper resportory infection. If it is this, you MIGHT possibly see bubbles in the throat of the cham when you open it's mouth. The other possiblility is parasites. To find out if he has this, the best way is to bring a fecal sample to the vet, for him to examine under a microscope. We here at "Ank-Inc" do our own fecal exams. However this is far too complicated to try when your a beginner. If it is not either of these, there is other possiblilities. For example, just one of your basic husbandry procedures might be a bit off, thus sickening your cham. Descibe in DETAIL everything about your cage, and setup. If it is not any of these things, I hate to be pessimistic, but in my opinion, you will not be able to save him. But this is not nesecarily true, just my personal opinion. Hope this helps a little bit. But do be sure to bring him to the vet asap.
Ank-Inc.
Adam.
