24 " fixture
Zoo Med ReptiSun T5 HO Hood this will come w/ a 5.0 bulb you want a 22" Reptisun 10.0 T 5
Zoo Med ReptiSun 10.0 UVB T5 HO 5.0 can be used as a back up but the distance and placement is different from the 10.0 or you can get this one
24 watt
Arcadia ProT5 12% UVB Bulb With Hood look at PetSmart they have started carrying this fixture you want the 12% bulb
When you get the new UVB please post back on here and I will help you set it up for your tank. the screen is going to determine where the UVB goes