Light Bulb (item)
From the Super Mario Wiki, the Mario encyclopedia
The Light Bulb is an item in the NES release of Mario's Time Machine. It is some sort of incandescent light bulb, which Thomas Edison patented in 1879 (although the game itself does not go into any details about it). It is stolen at some point by a time-traveling Bowser and then placed inside of his museum, where it is kept under guard by some Koopa Troopas. Later, it is taken by Mario after he fights off the Koopa Troopas; he then travels back in time to 1879 to return it to its rightful place. He proceeds to leave it next to a gramophone, and a news article immediately appears thanking Mario for returning the Light Bulb to Edison.