The male bearded dragon we just got came with this enclosure. We redid it except the lighting because everything was good there. It is only 18" from floor to ceiling so his basking spot is only 9" from the tip of the light bulb. Directly under the bulb the surface temp is 120°f. He tends to bask a little off center where the basking temp is around 100°-105°f. I'm not sure if I should change to a lower wattage or leave it because the aerial temperature is perfect with this one. The main thing I'm wondering about is if we wanted to switch to a mercury vapor bulb would that be possible with this little amount of height to work with? And also, how can I get his hammocks to stick on? I've only ever used tanks before this. Thanks!