I think everyone agrees that heat sources need to be regulated, but I think in this case (if I'm understanding it correctly) it was more due to set up. If I'm looking at the picture right the BP was coiled up on the hide on the left and it's back was touching the mesh top directly under the heat lamp. If that is correct, even if the heat lamp was regulated by a stat, as soon as the temps got low enough for the lamp to kick on it would have burnt her. I guess unless the temps in the house are completely unregulated I was confused how the outside temps you mentioned have/had any impact on how hot the mesh top gets when the heat lamp is on. I hope this doesn't come off as me being argumentative or contradictory, I'm new to this as well and trying to learn everything I can.