Types of Lamp Sockets

Lamp Sockets Made Simple

Lamp sockets may seem small, but they play a big role in how your lighting works and looks. Here’s a quick guide to help you choose the right one for your lamp or project.

Popular Socket Types

E26 / E27 (Standard Screw):
The most common socket. E26 is used in the US/Canada, E27 in Europe.
E12 (Candelabra):
A small screw socket for decorative lights and chandeliers.
B22 (Bayonet):
Twist-and-lock base, common in the UK.
GU10 / GU5.3:
Used in spotlights, often with LED or halogen bulbs.
G4 / G9:
Small pin bases for compact lights like desk or cabinet lighting.
Tube Sockets (T5, T8, T12):
For fluorescent tubes — each size fits a different tube.
E39 / E40 (Mogul):
Large base for high-power or industrial bulbs.
Other types:
E17, E10, G13, R7s, and screw terminals — used in more specific or custom lighting setups.

Choosing the Right One

To find the right socket, keep it simple:

Check your bulb type.
The bulb and socket must match.
Look at your lamp or fixture.
It usually lists the socket type required.
Make sure it fits your wattage.
Don’t use a bulb that’s too powerful for the socket.
Think about the design.
If the socket is visible, choose one that looks good too.