kevin, i know you were asking about my canopy. ill try to snap some pics soon but ill try to explain it. the top of mine opens completely so i can remove the fixture if i need, the doors in front are just for maintainance etc. the two ends have a 2" piece of wood that sits on top of the tanks frame, and thats what my T5 fixtures sits on. since its an aquactinics fixture it doesnt add any heat to the water, but being so close i have to clean the cover once a week because of the salt. hope that helps.
-Justin