Edison screw caps take their name from the inventor of the light bulb, Thomas Edison, and are universally used in a number 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 the most common type of screw cap for LED Light bulbs . The small Edison screw cap is often used as a replacement for the E26 screw cap in LED bulb design. It has a diameter of 14 mm and is mainly used in Great Britain and Europe. This cap is not to be confused with the 26 mm "E26," which is designed for the 120V US market. The bayonet cap, also called BC or B22D, has been used for many years as an alternative to the pin-push design for LED lamps. With a diameter of 14 mm, the small Edison screw bulb is a smaller version of the E27. The R50 bulb is supplied with a diameter of 14.5 mm and is embedded with an output voltage of 120V and a power of 1.2 watts. The cap is attached to the bulb an