top of page

What is B Socket?


Lighting plays an essential role in our daily lives, whether it's at home, in offices, or in public spaces. Understanding the different types of light bulbs and sockets is crucial when choosing the right lighting solutions for your needs. In this article, we will explore one of the commonly found sockets - the B socket - and learn about its characteristics, uses, and compatibility.


What is a B Socket?


The B socket is a standard lamp base type that features a bulbous shape with a two-pin design. It is often referred to as a Bayonet Cap (BC) or simply a "bayonet" socket. The name derives from its unique method of installation, where the light bulb is inserted and twisted into the socket, creating a secure and reliable connection.


Characteristics and Uses


One of the primary advantages of the B socket is its ease of use. The bayonet design ensures a quick and straightforward installation process, which is particularly useful in applications where frequent bulb replacements are necessary. The secure connection provides stability, reducing the chances of accidental loosening or detachment.


The B socket is commonly used in various lighting applications, including residential, commercial, and industrial settings. It is particularly prevalent in countries such as the United Kingdom, Australia, and some European countries. Therefore, if you have fixtures in your home or office that were designed for B socket bulbs, it's essential to understand this socket type for proper bulb selection and replacement.


Bulb Compatibility


The B socket is compatible with a range of light bulbs, including incandescent, halogen, compact fluorescent lamps (CFL), and newer energy-saving options like LED (light-emitting diode) bulbs. However, it is essential to verify the specifications of your fixtures and check if they support the specific bulb type you intend to use.


When purchasing light bulbs for B socket fixtures, it's crucial to consider factors such as wattage, light output (lumens), and color temperature to ensure that the lighting meets your needs. Additionally, be mindful of the size and shape of the bulb to ensure it fits properly into the socket.



The B socket, also known as the Bayonet Cap (BC), is a widely used lamp base type in various countries. Its key advantages include easy installation and a secure connection, making it a popular choice for applications requiring frequent bulb replacements. Understanding the characteristics, uses, and bulb compatibility of the B socket will help you make informed decisions when selecting lighting solutions for your home or work environments.

bottom of page