ON his upper left arm its darkened like a greyish color. If it is a burn what do I do ? he doesn't appear to be in pain doesn't even flinch when I touch it .Also I'm confused about his coloration, I moved him from his 18 in cage to a 4 foot cage which has not been easy to warm up it was all wired mesh so I taped plastic to 3 sides and left the front one open I was worried cas when he was in his 18 in glass enclosure the basking temp would get to 95 degrees and he was always lime green since moving him to the bigger cage about 2 months ago he is always dark green unless his lights goes off and he sleeps or I take him out of his cage to hold him. his current basking temp is 85 never goes higher and its about 6 inches from the bulb which I use two 50 w reptile basking bulbs and another 25 w small halogen bulb on the other side I have another light that's a long tube light to let him know its daytime. I didn't think it was cold for him cas he goes all the way to the bottom of his cage thorugh out the day but him being dark green all the time confuses me.