The end of light bulbs... as we know them.
Edison did not invent the incandescent bulb--Humphry Davy had a crude version in 1809--but he did make it practical and commercially successful. There have been improvements since his time--the filament is no longer carbon; the bulb contains inert gas instead of an imperfect vacuum--but the design hasn't changed much in a century. (Thomas A. Edison--National Park Service) Light bulbs are great--they're reliable, cheap, and bright--but they get hot, burn out, and they drink energy…
Grace