Watts per gal is a poor measure in most situstions. If you were to go with 5 watts per gal of PC lighting then I'd say you were around medium...possibly still a bit low for some types of corals. But overall with 375 watts of PC lighting (approximately 6x65 lamps) you could develop a decent selection of corals. But you could also go with 6x110 VHO's and have more options or even consider a combination of MH and either PC or VHO to futher increase your options. It all comes down to the type of coral you'd like to keep and the lighting requirements for that selection of coral.:thinking: