Originally Posted by CorallineAlgae
I put a 16" FugeRay over a 5.5 gallon planted tank after a 10w floodlight burned them. They're actually wonderful for growing freshwater plants in a shallow tank but they're no match for a floodlight. The 10 watt models are so small. I can't imagine how a refugium that can get a pump in and out couldn't fit one but if it can't you can try the FugeRay or the Ray 2. Lots of planted tank owners use them to grow tons of plants.
The area above the Fuge is a tight fit between the top of the tank and the bottom of the stand, if that makes sense. I have around 4 inches of clearance and would like a little air flow to allow what little air allowed in to move around.