Hello. Recently we put my adult 3 yr old beardie in a new enclosure. He was previously in an armoire that was built into an enclosure. He was using a 100 watt bulb, which was uvb and uva & heat all in one deal. It worked very well. Well we recently put him in a traditional enclosure for a beardie..Zen Habitat 4×2×2. We put in the same light, on the right side of his enclosure. But the heat doesn't seem to be enough. He'll spend hours basking, but never reach the point of having to regulate his heat with his mouth open. I feel him, and he does feel warm, just not hot like normal. Is 100 watt not enough for a tank that size? I'm not sure of the exact temp as of right now. I need a new temp reader. I have enclosed a picture of the tank and where the light is. Perhaps he needs 150 watt? Thank you so much.