VaughnH;23543 said:The problem would be to have the arm strong enough not to deflect with the fixture weight, nor the stress from raising and lowering it. I have been designing it in my mind for some time now. (I'm not there yet!)
One way to do it would be to have a the arm be supported by second buttress below, forming a truss (a triangle), thus minimizing the deflection. Of course, would make some part of the support visible from in front. The way to deal with that would be to build a "sleeve" for the light to increase the frontal area larger to cover up the moment arm when viewing from the front.
Sorry for the diversion from the original topic, but I found that idea very intriguing.