I think the lighting is good. My daughter did just replace the bulb and it's a Zilla 17 watt bulb...I don't know if that is a problem. He was shedding within the last few days and just won't even open his eyes. I just went up there now and if it wasn't for the fact that I can see him actually breathing, I would be really nervous. I pet him a few times and he's not even opening his eyes.