I have been using the Exo-Terra Repti-Glo 5.0 ever since I got my chameleon. I combined it with the repti glo 2.0 as well and my chameleon seems pretty happy. He eats a great amount, no bone warping is present and he is over-all in a great mood. I recently took out the Repti glo 2.0 and replaced it with an incandescent bulb to keep him warm. Its been about 5 months and he seems to be growing very quickly and is pretty happy.