I wasn't trying to be negative. You asked for opinions, and I shared mine. Even carpet fibers can prove deadly. Three and a half hours with no heat source on a cold floor is a long time. That would be like you being outside for three and a half hours in 30 degree weather with no coat. However, it is your tortoise and it is completely up to you how you care for it. But I will be honest and say I don't understand asking for help and then disagreeing with the answer.