I love RostaP's smaller arm system and I needed a way to mount might loose lights.
The lights and cords I used are listed below from amazon.
https://www.amazon.com/DiCUNO-UL-listed-Industrial-Decorative-Lighting/dp/B089QJK1WN/
https://www.amazon.com/Wise-Home-Products-Electronics-Replacement/dp/B0BR518545/
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The author remixed this model.