Your going to need to move your UVB inside the tank --- its a T 8 -- what brand of bulb did you get? Also you need to get a piece of decor approx 8-10 inches directly underneath the UVB NO plastic cover over the bulb - it needs to be exposed -- and move the UVB over toward your basking light right now hes getting NO UVB of where its sitting -- and the T8 is not strong enough to go thru the screen - the screen is blocking 30% of those rays and if the plastic cover is on more than that -- the digital probe needs to sit where hes sitting for a actual basking temp---I think 2 100 watt bulbs is too hot please check it ---- I would take out the step decor piece and that huge water dish its taking up alot of room - unless he is actually
drinking from the water dish he doesnt need it in there -- he will get moisture thru his salads greens you feed him every day if you wash them before serving --- also gut load his insects meaning feed them carrots they are a good
hydrating food along w/ other food as well --- and the dragon will get some moisture out of them as well as the salads -- I recommend dubia roaches they are the best feeder - he looks older so I would feed him 2-3 times per week insects and every day his salads
http://www.beautifuldragons.com/Nutrition.html ignore the kale thing its a good staple feeder-- I have websites for you if you need them to order dubias if you like they are way easier to keep and last longer than crickets --- also worms ---
The 60 gallon tank looks too small or maybe its just too cluttered he has no floor space --- they need floor space --- if you need help w/ how to hang the fixture in the tank let me know I will post that as well
Karrie