I keep two White's outside in a 3'x2'x2' screened enclosure. I live in Central Florida, where it is still in the 80's during the day. I would like to overwinter them outdoors as well. We do have some White's (lost or released pets) in my area that seem to take our temps well. On the few days that it does get very cold, what kind of heater would be best outside? I think that if I keep bringing them inside on cold nights, the sudden temp differences might harm them. Any opinions???

Thanks!
Laura