I have a 4' viv with 2 female Rankins Dragons (one brumating). The basking spot temp is about 41C, the temp on the back left hand corner floor nearest the lamp is about 30C but the right hand corner floor temp away from the heat lamp is only about 18C. This last temperature is concerning me. Should I worry? if so, what should I do?
18c is low but not necessarily dangerous, especially since warmer areas are readily available. How does 18c compare to the ambient temps in the house? You could set up a small heat projector on that area to bump the temps a bit, but I really wouldn't worry about it too much since the other temps in the enclosure are plenty warm.