I have a 7/8 month old male yemen, Ive recently moved him from a 18/18/24 exo terra glass viv to a 24/24/48 screened cage. He's about 12" long at moment but I'm worried hes not getting enough heat, there is a 80w Arcadia d3 heat /UVB lamp combined on top of cage.he eats and moves well around the...