I run 3 110w on my 110g tank. I have them mounted in a wood canopy with no glass tank cover @ 6 inches off the water. They seem to work great. Run 1 actinic and 2 daylight bulbs on a timer with I believe an Icecap 660 ballast. Not sure if 4 x 110w is too much (could probably run 3) but if you use glass over the top of your aquarium 1) your effective light will be reduced and 2) you need to watch your temps, they will run warmer than PC
120 Oceanic reef w/40-gallon sump/refugium EuroReef skimmmer, 400wx2 MH
, Iwaki pump and 200 lbs LR
Green & Red Musrooms, Pumping Xenia, Green Star Polyps, Green/Purple Ricordia, Orange Ricordia, Green Acro, Bubble Coral, Hammer Coral, Maxima Clam, Crocea Clam, peppermint shrimp, various snails and crabs.
Yellow Tang, Mated Perculas, Bicolor Blenny, Elaegant Wrasse, Possum Wrasse, Clown Goby, Purple Pseudochromis, Coral Beauty, Golden Angel