The 'Dendera Light' — went there specifically to see it and now I'm annoyed at b

You've all seen the meme image: ancient Egyptians holding what looks like a giant lightbulb with a snake inside, ergo electricity, ergo Atlantis powered the pyramids etc. It's a real relief, in a crypt under the Temple of Hathor at Dendera near Qena, Ptolemaic, around 50 BC give or take. I crawled d……