WPG as we used to know it no longer applies. With the advent of T5s and MHs and the like, there is no fair comparison between the two other than things such as PAR and lumens, not watts per gallon.
For anyone who is out of the know, T5s are VERY comparable to MHs and have been documented to even color up acropora!! They use less wattage and have the same results. So where a 55w T5 might equal something like a 175w MH (this is just an example, I don't know if it's true...simply for illustration), put both of those over separate...say...20 gallon tanks. The one with T5s is going to come to 2.75 WPG whereas the one with MHs will come to 8.75 WPG.
That's not fair, considering they will both have the same results.
Your tank is about 33 gallons. You have 78 watts of T5s over it. My opinion: you are going to be just fine with that. _________ 125 Gal Reef. Born March 2002 FISH: Ocellaris Clown, Yellow Tang, Fairy Wrasse, Sand Star, Fuzzy Dwarf Lion, Mandarin Dragonette, Hippo Tang CORALS: Green Striped/Red/Purple Mushrooms, Green Star Polyps, Yellow Toadstool Leather, Bubble, Frogspawn, 2 Hammers, Yellow Polyps, Open Brain, Ridge Leather, Various Zoas, Button Polyps, Kenya Tree, Colt, Elephant Ear Mushroom, Clove Polyps, Torch, Purple Clam, Rose BTA  |