That light is meant to sit on top of a glass lid. You can prob mount that inside a canopy, but you will have to build it yourself. Standard canopies won't hold an enclosed fixture like that.
Another option would be a wood canopy meant for reef lights. These are big things that sit on top of the tank. I have seen them at PetSmart, but they are sold with the stand, not separately.
Personally, I'd go with a glass top, or leave the tank open top & hang the fixture from the ceiling.
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.