So yesterday I decided to buy a leo, the guy at the store told me a light is required but I've been reading online and elsewhere that they are not. I have a heating pad on the right side to make a heat gradient, and the pad is keeping the ground of my tank at a nice 90-93 degrees at all times. My air temperature in the tank ranges from 70-75+ and with the light it gets up to about 80. Should I be using a light on top of the heating pad? Or is just a heating pad sufficient for my little guy. He's a juvenile, about 3 months old.