I have 4 yearling mt. torotises, and i know mt. tortoises love shade and such, but my outdoor enclosure has a lot of shade and part of it is sunny. I would say like 70 percent shade to 30 percent sunny ratio. The mt. tortoises love to hang out in the sunny side and even look as if they are basking. IS this normal behavior? I also read that to much UVB can make them go blind, so is the sun to much for there eyes? or is the blindness more of a bulb thing.