A B22 light bulb is an electric lamp with mechanical support and electrical contact provided a bayonet cap, often referred to as a BC. B22 is an abbreviation of the cap designation B22d-3, which is the most common form of the bayonet cap. B22 lamp bases use a pair of pins on the outside of the base that slide into slots in the socket. The twist type base allows lamps to be secured into light fixtures with a simple push-and-twist action. The number 22 in the cap designation refers to the width in millimeters of the cap’s base. B22 light bulbs are used in some former members of the British Empire, which include the United Kingdom, Australia, India, Ireland, New Zealand, and Hong Kong.
at the Open Lighting Product Directory (OLPD)
