Don't NEED mh for sps. Something else I like about t5 is that the wattage is spread over the whole tank. I mean if u have a fixture w 2 x 250 hqi over a 48" tank us say that ur pumping 500w into the tank. the problem is that it's only 250w over half the tank and u need 2 to cover the entire tank. If u have 500w of t5 over a tank u have an actual 500w the entire length, not just 250 on each half.
Ya I'm partial to t5 haha. Guess I'll have to learn the hard way Hugh? Hehe
have a great night everyone!