So after a search online, I finally found a 6 bulb 24 inch T5 fixture for my Marine X 60.2. Oddly enough, this wasn't easy to find. What's funny though, is that HTGSupply is another hydroponics company like Vivosun. Oh man, those plant people really have lighting figured out. Anyway, for a year I will be running a 2x2x2 combo. 2 True Actinic, 2 Blue Plus, and 2 Purple Plus. All ATI bulbs. I'll be taking a pic of the fixture every month for a year, as well as noting any salt build that should happen. I'm willing to bet that I'll like the fixture though. It shows promise.