[As long as your canopy is 72" and your VHO are nearly 72". Take 4 small pieces of wood, maybe a 4"x4" piece of 1/4" plywood. Or you could just two as long it is the width you want your lights apart. Attach it horizontally to the inside ends of your canopy with some small angle braces at the hieght you want your VHOs. Then mount the end cap to the bottom side of the piece of plywood. When you get it the wood attached, before you mount the endcaps to it. You could seal the metal with some silicon and use some good white paint to seal the plywood.]