It's never a good feeling to come back from a trip and realize you left the bathroom light on. The owner of a building in Los Angeles was feeling that pain and then some when he found a neon light that had been left on since 1935.
As reported by the LA Times, Andrew Meieran was renovating his eatery Clifton Cafeteria when he noticed light shining through a storeroom wall. Further inspection revealed a glowing neon light that had been paneled over in 1949, but never disconnected. Oops.