my adult corn is now in a 40 gallon breeder tank with a 75 watt red night light and 100 watt basking lamp. the hot side gets to 82 degrees during the day, and the cool side 72 during the day--night time i keep the red light on-- the temp drops at night to 72 hot side, 68 cool side. i was worried that this temperature is too cool at night, so today bought the uth. i'm a little bit afraid that it will burn my snake, even tho the salesman said it was only 25 watt and may not even be warm enough! im tempted to just plug it in at nighttime,leaving it off during the day. any thoughts? i have a good 2 1/2 in. of substrate.thanks!