Ok so these are all 24" fixtures and good for 40 + gallon tanks
Zoo Med comes w/ a 5.0 bulb you need the Reptisun 10.0 T 5 bulb or the Arcadia 12% 24 watt bulb will work in this fixture as well- will post a link
Zoo Med T5 High Output 10 UVB Lamp
joshsfrogs.com
A revolutionary new range of high performance T5 reptile lamps from Arcadia. Offering a significant increase in both visible light and UV output compared with T8 lamps of similar length.
www.reptilebasics.com
ProT5 is a highly adaptable lighting kit with high quality internal electronics, a high effective but removable reflector, power cable, fittings kit & bulb
www.reptilebasics.com
you want the 12% 24 watt fixture w/ bulb
or this one you will need to change the bulb out to the bulb posted above - you can look at PetSmart for the Reptisun I posted above they have started carrying them - just make sure its the 10.0 T 5 NOT the T 8 bulb
Sunblaster Nano Tech you want the 2 ft or 24" fixture
Buy the SunBlaster NanoTech T5 HO - Fluorescent Fixture with 6400K Lamp at Hydrobuilder.com. Shop the entire line of SunBlaster products along with thousands of hydroponics supplies on sale now.
hydrobuilder.com
When you get the UVB please post back on here and I can help you get it placed and distanced your screen on your tank will determine where it needs to go