No and yes, depending on where you live. Corn snakes are actually a north american snake so they are usually used to the ambient temperature in your home, unless you have air conditioning that keeps the cooler then 72F. In my case, my corn snake only gets a heat mat because it can reach 80F in my house during the summer. During the winter (with the furnace) It usually stays between 68-70F. But corn snakes naturally will get cold temperatures during the winter. As for humidity, it is still important but again, being a north american snake it will tolerate the humidity it naturally gets from the weather you experience. Heat mats only provide a hot spot (basking) if your corn snake requires a little more heat. I have never used a heat lamp for my corn snake. She is super healthy, a super eater, sheds great, and is growing like a weed.