Well I didnt want to upset you about your opinion on lighting. The WPG rule came about I believe it was back in the 70's when everybody used the same lighting as in T-12's but with advancements it doesnt apply. I will gaurentee if 3-4 WPG of T-5 HO's were put on a tank it would be nothing but an algea farm. The T-5 HO's are being used on reef tanks and with 4 WPG you can keep just about any coral or anemone you might want as long as the tank doesnt go over 20 inches deep and they can be kept at most anywhere in the tank.