Ok, so I am ALREADY thinking about the upgrade for my panther boy Ripley. Right now he is in an 18x18 Reptibreeze. He is only 4 months old so I was going to upgrade when he is a tad older. I was initially looking at the 24x24 Repitbreeze but now I have found the Exo Terra 36x18x36, so basically it would be like two of the one I already have. Which would you suggest? I thought the 36 Exo Terra would give him more lateral room to explore. Also would I need to change out my UVB light? right now I have a Zoo Med 5.0 that takes the 18" bulb, it would fit on the 24x24 but be too short for the 36" would I need to go with a longer fixture and bulb? Thanks in advance!!