Can I put t5 lights in any tube light fixture?

I already have a 48" Fluro light fixture that holds two tube lights. I was wondering if I could get 2 t5s and put them in that light fixture. Honestly, I don't see why not. They will fit in there, but I just wanted to make sure before I bought the lights.

I think you better look into it. the normal is a t-12
I dont think the T-5 will work with it.

hey i dont know about putting t5's in there but if you cant you can still put t8's in there