These are wall sconces destined to have LOW VOLTAGE UPLIGHTING. They are designed to be installed on either side and illuminate a painting for my client.They are fabricated from 1/8th inch stainless steel with a backing plate of 16 gauge.
Width is 14".I now hand off the sconces to another tech who will install the lights and wiring.
My client had originally seen my Nautilus sculpture:

http://ou8nrtist2.deviantart.com/art/Chambered-Nautilus-Shell-base-155066819

and asked if sconces made to look like a sectioned nautilus would be possible for me to make. Apparently they are.
I had to enlarge the size somewhat in order to make room for the inside lighting fixtures. This will be LOW VOLTAGE lighting.The transformer as well as the wiring will be hidden in the wall.
There are two keyhole shaped mounting holes on the back of each fixture to mount to the wall and keep them stable even during an earthquake...Two mounting holes will also mean the electrician won't have to worry about balancing his wiring and lamps inside the shell. These are all features one must consider with FUNCTIONAL or DECORATIVE ARTS.
I still adhere to the mantra "form follows function".