Hey Marc,
Thanks, will look into those, my canopies are not that heavy, only VHO ballasts mounted on them, the MHs are remote. But I have a false ceilling above my tank, I would like to drop my lights closer to the tank, and be able to push it back easy for feeding. And them maybe pull all the way forward in front the tanks to change lamps (this would not have much support, they would be free floating). Last time is was big job to lift everything down and work on it.
How far is the travel on those? I would need 5' min but that should be no problem for a barn door. If I make them move, maybe I will need to put the MH ballasts on the canopies. I guess I will go over 100lbs fast too. Thanks for giving me more great ideas and making me more work
Lee