Hey Kevin,
I am currently hanging the fixture, not using a canopy.
For hanging the lights on multiple angles, and possibly supporting other lights you might take a look at using http://eztube.com/ to build a custom light frame. A little drawing, a few experiments, and you should have something that meets your needs for either a frame that sits on your aquarium or one you could suspend that would hold the lights quite handily and still allow for adjustment.
Cheers,
Ray
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Current Tank Info: 360 degree walk around 300 DD island–4 300W & 2 165W ViparSpectra, 4 Kessil A350W, 2 A360WE, 3 XF150, 1 XF250, 1 XF350 Gyre along with 2 PP40 and 2 IceCap 3K gyre for robust current. Basement 150 gallon RubberMaid sump, SKIMZ skimmer, DCP18000
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