I have been keeping my tort table warm with just the lamp through the day and she as been happy and active. I have been thinking the last few days about starting to use the heat mat on a night as its starting to get colder on a night, so yesterday i set it up and placed it underneath the tort table in the area she sleeps and set timer for it to turn on after lamp turned off. All was well at first i kept a eye on the temps to make sure it was not too hot but around 11pm i noticed noise from the box were she sleep i turned the room light on an Shelby had woken up and the temps near mat were at 80. So now i am not sure what to do as i think the higher temps woke her up but i do not want her to get cold, so i debating whether to have mat on but for short bursts or to leave it till temps get lower as winter kicks in. I live in the UK and she is too young to hibernate yet.