Using a filament of carbonized thread, Thomas Edison tests the first practical electric incandescent light bulb (lasting 131⁄2 hours before burning out).

An incandescent light bulb, also known as an incandescent lamp or incandescent light globe, is an electric light that produces illumination by Joule heating a filament until it glows. The filament is enclosed in a glass bulb that is either evacuated or filled with inert gas to protect the filament from oxidation. Electric current is supplied to the filament by terminals or wires embedded in the glass. A bulb socket provides mechanical support and electrical connections.

October 22 is the 295th day of the year in the Gregorian calendar; 70 days remain until the end of the year.