I had my baby caiman lizard for about 4 days now. Hes always tired for some reason. He's only awake like an hour or two total a day. Only time he moves is to find a new spot to lay down and sleep. He ate tuna mixed with salmon cat food today, then went back to sleep. I didnt have a uvb bulb on him for a few days until today. I never seen him bask either, his basking spot is about 100 degrees depending what time of day. My temps are all within range, however he is in the basement and it is still cold here. I have a heat pad all over the underside of the tank. Is that good? Whats the lowest temps these guys can handle?