What size fixture should I be looking for in a UVB fluorescent fixture for a 40B tank? I can find plenty of inexpensive 24” fixtures, but can’t find a 36” for under $60; does the UVB have to run the full length of the tank?
It all depends really on how you set the rest of your tank up.
The t8 needs to be 6-8 inches from the basking spot, unobstructed. So not on the mesh.
A t5 HO can be on top of the mesh since it's a much stronger output. In a 40g breeder you wont really have the height space to mount it inside as the t5 HOs will be too close. T5s should be 15"~ from the basking surface.
So to put it simply, get the t8 if you're going to be mounting it inside the tank.
Get the t5 HO if you will be placing it ontop of the mesh.
Counterintuitively (to me, anyway, until Brandon splained me), the thinner T5 bulb is stronger (more powerful?) than the larger dia. T8 bulb. (Different Tech)
If you study the charts carefully for your tank & situation, it should become apparent which is the best choice for you.
A t5 HO can be on top of the mesh since it's a much stronger output. In a 40g breeder you wont really have the height space to mount it inside as the t5 HOs will be too close. T5s should be 15"~ from the basking surface.
So to put it simply, get the t8 if you're going to be mounting it inside the tank.
Get the t5 HO if you will be placing it ontop of the mesh.
I think I'll go with the HO, then... I prefer not to have to mount a fixture inside the tank. Thanks for the tips! One more question: if the HO needs to be about 15" above the basking area, does that mean I shouldn't put a climbing branch in the tank? Would that put my beardie too close to the HO?
That recommendation is if the bulb is unobstructed. So if it's on the mesh the dragon will need to be closer. Around 8 inches or so at the basking spot would be good
That recommendation is if the bulb is unobstructed. So if it's on the mesh the dragon will need to be closer. Around 8 inches or so at the basking spot would be good