Light fixture sockets have a grip on the inside of the socket, and light bulb bases have a matching metal tab on the outside of the base. This is to prevent dangerous light bulbs from being used in light fixtures that aren’t designed for them. However, light bulb bases are not standardized. If light bulb bases were standardized, light bulbs could be interchangeable across many fixtures. The light bulb base has to match the socket in the light fixture. Light bulbs have to fit snugly into light fixtures, so they are designed with different bases. These three types of lighting are the most frequently used in traditional lighting. As indicated in the table, there are several sockets that fall between these sizes. The three most often used sockets in the United States of America are the E12 (candelabra), the E26 (medium), and the E39 (mogul). Additionally, this socket is referred to as a Medium socket. An E26 socket (the most common type) is 26 millimeters wide and features an Edison thread interior. The size is a simple millimeter measurement of the width. The E stands for Edison and indicates that the socket is a screw type. The most common type of socket is the E type. Socket sizes are determined by a simpler rule known as Type-Size.

Sockets make it possible to replace lamps in a safe and convenient manner (re-lamping). Light bulb standard base sizes What is a Light bulb socket?Ī lightbulb socket, also known as a light socket, lamp socket, or lamp holder, is a device that mechanically supports and electrically connects a suitable electric lamp. Use this visual light bulb base chart that includes pictures of conventional light bulb bases, fluorescent bases, and specialty halogen base types to find the light bulb you need. Details are after the Light Bulb Bases chart or Socket Sizes chart image. Also covers, what do the different lamp bases mean, why different lamp bases are used for different lighting applications, and where those light bulb bases are used. This article presents a list of the available light bulb base or socket types and standard light bulb base sizes. To fit the socket, bulbs are made to fulfill these same specifications. It’s possible that it’s an E39 Keyless Porcelain Socket.įortunately, there are standards in the lighting sector, and parts are manufactured according to specifications. When performing repairs, restorations, and lighting creations, it is critical to select items that are specifically tailored for the job at hand.

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