Up, down, on, off. Rob and Jairen take a shot in the dark as they dive into the history of the light switch. Loads of history and historical ad-libbing in here folks. Come and listen to the beautiful nonsense of an everyday device. Learn more about that mystical thing on your wall.

Sources

https://heatonhistorygroup.org/tag/john-henry-holmes/

https://en.m.wikipedia.org/wiki/Light_switch