What kind of light is this and is there a lightbulb based on it?

I knew it was gonna be TC before even clicking. That guy makes amazing content.

"Did you ever wonder how [common device] works?"

"Nope, never!"

"Well here's how it works, why it works this way, and the history of [common device]"

"Amazing!"

I watched that video when it came out but i guess i forgot about it haha

Watched this last night and it came to mind immediately.

If you didn't link the Tech Connections video I was going to lol