I have a Photon 48 over my 75g. I couldn't be happier. Programmable, full spectrum led's at a very nice price, and they now come with both tank mounts and suspension mounting kits. Also, Logan is a great guy to deal with.
If I had to do it over again, it would still be through Logan and ReefBreeder's.
Folks that have it over their 4ft/90/120 tanks..how far off the water are you running them?
I have a canopy that would limit how high I could raise it while still allowing for air flow around the fixture.
The Photon 48 is only 42.5" long. I have a 5' tank and was going to get the 48 but that is too short.
The 60 is 55" long which would work great but it is pricey.