Recently I made a shadowless lighting rig and highlight lamp. I had some LED boards laying around and I'm sure any boards you have lying around will work as well. I bought 1/2" aluminum rod from McMaster Carr it was 1/2" x 1/2" x 36" square tubing. I also used 1/4 20 bolts (3/4" long) and nuts for the hinges. Use the caps to cover the bolt head and the nut to tighten the hing assembly. The mounting base has a #8 clearance hole with a countersink. Check out the photos of my rig!!