Having some trouble with my temperature in my ball pythons terrarium. He is 5 months old, I have him in a 20 gallon long glass tank with a mesh top, a heat mat on one end and a 50 w red lamp above, a hide on both sides and a few fake plants and branches. I’ve been using a laser thermometer and I’m having trouble with my temps. On the hot side he has the mat on keeping it between 86°F and 92°F, but on the cool side it drops to 72 which is way too low. I live in northeast USA so it’s generally very cool. I’ve tried moving the lamp to the middle of his terrarium to try and let the temperature gradually change so now it’s good on the hot side, between 80 and 86°F in the middle but his cool side drops Down to 72 and I just can’t figure out how to get it up without putting the lamp all the way on the cool side which doesn’t make much sense to me. It’s like two extremes hot to cool instead of a gradual change. Any idea how to smooth out the temperature evenly?