How did you suspend you MH lights over your tank

[Chowder]

Not sure if this helps you out but I ended up putting a shelf over the tank attached to the wall. Got two sliding drawer tracks from Lee Valley and attached them to the bottom of the shelf . Put two thin bolts through the holes in each end and bent them like hooks. Used picture cable to attach pendents to the hooks on the tracks. My lights are sitting 4-6 inches of the water surface. The lights retract out from the shelf about ten inches and move out of the way so I can work in the tank.