UVB

Hello, I have an around 1 year old testudo hermanni. For now i use UVB bulb. I put it next to the warmer lamp. But because he is pretty young yet and because it's winter here, he is sleeping a lot. So basically he spends only 2-4 hours around/under the UVB lamp daily because he is sleeping at the other corner of his enclosure. His shell is nice, but I want to avoid the pyramids or deformations. Should I put his UVB lamp above his sleeping corner?