It's good to have about 32 degrees. You don't have to have a lamp, but I use one as my carpets like to bask in their branch.... Unlike Sam, I keep the heat on through the summer cause I keep my house well bellow 30 degrees. If you keep your pythons outdoors it could be a different story... At the end of the day your snake needs enough heat to safely digest its food. Otherwise there is a real risk of food poisoning...