Can I keep anything with 4x18w T5?

[Corndork2]

I recently was given two used coralife T5 fixtures. They are T5 units each features 2x18W (1x10000k, 1x Actinic03) I have two of them on a 20 Long right now. Are they enough to keep anything like Ricordea, or zoas? or any other low light species?

[Phong33]

Yes, that will be enough for low light corals like the ones you mentioned. Keep in mind that when you read about T5's that the ones you have are NO (normal output) and not HO (high output).

[Corndork2]

I realize I wont see stellar growth with just those, but using NO bulbs, those will be enough? I really love rics and would like to put a few into my tank