The large photo reveals quite some hand crafted tinkering, if you zoom in into some details... ☺️
It probably took him so long to finish it and publish the picture because he had to wait until the paint and the glue between all those plastic parts and pieces dried off...
A real convex glass lens in front of a lamp would look very different, and would not show the background like a thin piece of glass or plexiglass....
Can you imagine to always plug that lamp into mains to turn it on? There is no switch as far as I remember all the provided details. What a masterpiece...
I was just looking at how the aluminized duct tape covers the concentric recessed light baffles, just inside the cover.