Wow, good find. I had no idea that there was a name for it.

One hop away from that page: https://en.wikipedia.org/wiki/Prisoner%27s_cinema

> Others have noted a connection between the form the lights take and neolithic cave paintings.

That's a really great way to explain it. https://en.wikipedia.org/wiki/Cave_painting#/media/File:(1)J... is pretty accurate for me