70f is way too cold. Last Thursday we had a power outage and my house got down to 70f. You know what I did, I woke up at 3am, started up my car and cranked the heater on, piled everyone into totes and we all spent the next 4 hours in the car with the heater going like Noah and the ark. It was miserable. I was tired as hell and cars are very uncomfortable after 4 hours. But you gotta do what you gotta do the take care of your animals. They depend on you for their safety and well being. Funny part was my bearded dragon didn't wake up through the whole thing. She finally woke up at 9am when her lights came on from the timers and looked at me like "why are you awake and why do you look so tired?" Bottom line is get that ambient up about 10f or you could have some health issues not to mention feeding issues.