Here is an idea of such a lamp :-)
Step 1: The parts
Some bulb sockets
Two wooden pyramids
Some Vulcan Fibre
A dimmer modul
Brass srews, nuts and copper parts
A copper top for fences
Some pieces of plywood
Step 2: Building the top of the lamp
Then I mounted the E14 bulb sockets.
Than I cut a hole to the copper top and two pieces of plywood for the top of the lamp.
The copper top was mounted with ball nuts
Step 3: Mountimng the top bulb
I adjusted the bulb socket so it fits exactly to the copper top.
Then I attached the cables and then I glued the the lamp top and the pyramid together.
Step 4: Building the lamp
I glued the upper and lower pyramid together
Than I cut two pieces of volcan fibre and mounted the switch and the dimmer poti to them.
The poti knob is covered by a piece of copper tube.
Last step was the mounting with brass nuts and screws and the cabling.
The cabling ist easy: Alll bulbs are connected parallel and the cables from the bulbs are connected to the dimmer modul.
The mains cable runs trough the switch to the dimmer modul as well.
All metal parts are connected to the earth wire!!!!
You can find an example of a dimmer modul HERE
I stained everything with wax stain.
Have fun :-)