I have dual heating in my cages and it's nice to be able to use the flexwatt or RHP to heat as needed. I've got nine snakes and 2 herpstat 4's plus one redline #1. Note, RHP will heat up the cage above quite a bit also, can be good or a problem. Personally I would add a space heater to the room and try to get ambient temps up to at least 72 ish for everyone's safety, in case any heat source goes out, to keep temps up without running all heat sources nonstop and so you can take them out of cages without risking their health.