zxyqu 
I went to both Quantum and Hydrofarm websites and I hate to report that their products must have gone up in cost. Neither site had a 4' double-bulb T5 HO fixture for less than $100.00; with everything added up I got my fixture, cord and bulbs for $67.00; as I am on a very short, very thin shoestring, I will probably continue with Home Depot for the fixtures right now.
This unit was set up so that it could be hooked in a series of up to 8 fixtures, which may come in handy someday as I hope to have 8 growing shelves set up eventually.
I was glad to see that both sites had the selection of bulbs I wanted, and reasonably priced, so I will use them; pl;us they had a selection of add-on items that I liked very well.
Indianapolis (my hometown now) has two hydroponic stores that I know of. One is very pricey, although very nice, the other is smaller and very reasonable. He stocks the T5 fixtures and bulbs, but his cheapest 2 bulb fix. was 119.00 - Again Home Depot wins.
Thanks for the heads-up - I will be exploring these sites further

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Call-me-bob: 
I still have no definate answer on the aquarium light usage. If yo use it and it works, then it works. But I was directed differently. I wonder if the plants worry about this stuff like we do -!
Steve