Zens are nice tanks - you need a 24 or 36" uvb fixture-- either a zoo med or Arcadia pro T 5 w/ a 12% bulb or a sunblaster nano tech w/ a reptisun 10.0 T 5 - the zoo med fixture comes w/ a 5.0 bulb you need to change it out to a reptisun 10.0 or a Arcadia 12% bulb - please get two digital probe thermometers one for your surface basking temps - how old is the dragon? You want 3: temps in the tank - surface basking - middle 90's and cool side day 80's- basking bulbs are trial and error- you may need more than one to get surface basking temps--- I would get the black mat that they have for the tank - the floor is too slippery