I would like to note, you should also have 2 hides... One on the hot, one on the cold. That temp is k, but I also use a heat lamp with my uth because I too like my apartment cooler than that. It's not ideal, just make sure you will have regular temps, because if it heats up in there the heat lamp can easily make it too hot. As for the health of your snake, I am going to assume, and correct me if I am wrong, that you have a mesh top? Covering that 90% in foil with a cutout for your light will immensely help your humidity remain constant. 60% ish is ideal, 70% for shed. It being too low is bad too, and can cause eventual RI problems.