Edison screw B-22 Cap take their name from the inventor of the sunshine bulb, Edison, and are universally utilized in sort of applications. The popular cap design for LED lamps is Pin Push, which consists of two parallel pins. It is the standard selection for bulb caps around the world and thus the most typical kind of screw cap for LED bulbs.

The small Edison screw cap is typically used as a replacement for the E26 screw cap in the LED bulb design. It has a diameter of 14 mm and is especially utilized in Great Britain and Europe. This cap isn't to be confused with the 26 mm "E26," which is meant for the 120V US market. The bayonet cap, also called BC or B22D, has been used for several years as an alternate to the pin-push design for LED lamps.