How deep is your tank? I had a 24" Finnex Ray2 DS on my 29G (~16" to substrate) and I measured approximately 65 PAR at the substrate with the light right on top of the tank.
Those things are built like tanks too. I must have dropped it from the top of the tank onto my tile floors 6 times or so, and it never skipped a beat.
It's a 30breeder, so 18 inches deep or so. About 16 to the substrate.
Do you think 65 PAR will be enough to really bring out the reds in my plants?
I was contemplating getting a couple of those LED floodlights instead. Perhaps 2 20w and put them about 8 inches over the tank.