The author remixed this model.
I wanted to hang my lights from the ceiling so I changed up the base (now the top) to allow a bulb to pass through. I also found that my clear filament was too transparent and didn't diffuse the light very well. A piece of standard white paper turned out to be a phenomenal solution but I had to add a frame to the inside to hold the paper to the walls. Some adhesive is still probably a good idea.
2 frame pieces are required per lamp if you go the paper route.