For those of you shyly interested I found out the 4' fixture idea will work however the problem is finding an all plastic housing as most are metal, too heavy and prone to rust. I may come up with a compromise and attach 3 or 4 slim plastic 18" florescent tube receptacle without hoods but with integrated covers, to the inside canopy door. It will provide even more clearance without clutter and be much lighter. And since the receptacles base slide on and off with screw rails, they can be moved around if needed. As soon as I'm done Ill provide the long anticipated photos.
