[mr_alberta]

How about a tall canopy and mounting the lights in there? It'll also prevent you from being blinded if you sit near the tank. If a canopy is a no go, you can always mount some sort of brackets on the wall (or a shelf) that protudes outwards from the wall and over your tank and mount the lights to the brackets/bottom of the shelf. If neither of those options are feasible, you'll probably need to get a different light system that has some sort of legs for the super clean look.