My beardie is 9 months old, and I have recently changed his tank substrate & bulbs. Im witnessing a strange behaviour, which I think is a serious one. The uvb bulb is an exo Terra 125 watt solar glo. Since I changed the bulb to this one, he keeps the eye which is facing to the light closed. I don’t know if the problem is that the light is too bright, but I think it’s something to be concerned about. Since I changed his uvb he is much active and energetic, but this behaviour has me concerned.