Light bulb

A light lulb is a sealed body of glass that contains a filament(a coil made of a specific metal that when current is applied, glows brightly) and sometimes a quantity of gas (such as in neon signs, where the slow burning of the gas causes light to be released).

The electric light bulb was originally invented by Thomas Alva Edison in 1879 and patented January 27, 1880 (patent #223898(US)), however multiple inventors and scientists at the time were working to produce an incandescent bulb.