i measured it ontop of the spot he sits, 3.0 exactly, and the other spot he usually sits on 1.5.He is chunky... You can tell by the shape of his casque and the girth to his limbs. This is not bloated this is fat. So crickets and superworms are fine. But how many do you give him and how often are you doing this???
A 10.0 can be used but only at the correct distances. I can tell by your pics he is sitting too close to the UVB with a 10.0 bulb. When you get the solarmeter you are looking for a 3.0 UVI level nothing higher.