I will look when I get home, I bought those two used from a friend, the receipt was dated for 2011 so they are from being out of commission. Right now I am hitting 85F for basking but I had to crank up the max to 100F, based on what my temp gun is telling me all this nonsense should stop when I attach the probe to the floor of the cage today...if not then I am using the damn things for target practice.