I've read all I can find on different light/heat sources for our gopher snakes there are so many choices and still can't quite figure out what we need. The overall temp in their enclosure has been fine through the summer, but I'm concerned as it gets colder into fall/winter (we have only had them since spring). We have the stick-on under-tank heating pads, but they don't seem to effect the overall tank temps by more than a couple of degrees. Do they also need a basking lamp or something else to warm them up? Trying to do right by these guys but I really don't know anything about snakes and I need help.