So I'm in the research/planing stage for a dragon. So I'm thinking building a 4x2x2 cage out of wood cuz I read that's size for adults my question is can they live in one that big from small to full grown or do I start wit 20 gallon long and move up? Also with lighting I was gonna use the round lamps and cut two holes put hardware cloth over it too rest the lamps on. I only need the two lamps right? And would mouthing inside be better with the hight of the cage?