The supports are a pair of 2" sch 40 pipes connected just below each glass shelf with a 2"x1/4" flat bar, the lights are housed within a small piece of 2 1/2" (3"o.d.) pipe 3" long beneath a 1/4"x6" flat bar that slips underneath the lower shelf. The wiring runs inside the vertical support pipes, and through a 3/4" pipe that connects the 2 1/2" pipe segments underneath.
At the outer edge, the shelving is suspended with 1/2" steel rods from the arms above. The arms above are a v-shaped, tapering steel arm fabricated of 2 pieces of 1/4"x4" flat bar welded at the bottom vertex.