There are different ways of doing it. I use a night drop on my thermostat to take the temps to 80-82pn my hot side. My cool side obviously get a bit cooler though, more like 75. Some people just turn the heat off at night and heat the room to about 78-80. I know people who keep all thier snakes at 90 year round and produce viable clutches every year. Find something that works for YOUR situation. If you choose not to cool, once you introduce the male your female should after a bit start cooling herself(she'll spend the majority of her time on the cool side).