I’ll post a gutload image below. I have no idea for two-month olds, but definitely no higher than 80*F, someone else will clarify. His UVB bulb should be 8-9” away from his basking branch. Home improvement stores have cheap and accurate digital thermometer-hygrometer combos in the weather section. I use three, one near the top of the cage, one in the middle, and one at the bottom. Granted, that’s for a bigger cage, but de get at least one. Get the digital thermometer with a probe, too. I also have an infrared temp gun to spot check areas. I’ve edited my post because you said he only fell once. If he continues to fall, make a hospital bin for him. It basically does exactly what you said and is used as the enclosure (and shorter). He could have parasites overexposure of UVB, or something else wrong with him that you can’t see. Definitely try to get bloodwork done at the vet, along with doing x-rays and a fecal float (bring a fresh fecal sample with you)