Standard Light Bulb Socket Sizes

You can compare most common e size designations with a thread diameter see the specific light bulb name for that size see what are the most common applications and even see the official standard for light bulbs.

Standard light bulb socket sizes.

Take the number and divide by 8 and that is the diameter of the bulb at its widest point. The edison screw fitting is a system of screw mounts used for light bulbs developed by thomas edison in 1909. Here is the light bulb socket size chart to help you determine what size do you need your light bulb to be. You don t want to buy a bulb only to find that it doesn t fit in the socket.

Light bulb socket sizes chart. Bulbs with these base types can be used interchangeably as there is only a 1 millimeter difference in base size. Another common a series light bulb type is the a15 bulb which is commonly used for appliances and ceiling fans. The image below compares our g40 and g50 bulbs in c7 and c9 base sizes.

The a15 bulb is 15 8 in 1 7 8 in. They are commonly used for general lighting in standard light fixtures such as ceiling lights lamps can lights outdoor spotlight and flood light fixtures and. No matter how the end user places the light bulb base into the socket it will always turn and lock into the same position every time creating a fail safe for the light bulb s operation. Light bulbs come in a variety of shapes and sizes and are generally categorized by their bases the part that screws into a light socket.

In the early days of. Bulb base the final important piece to selecting the right bulb for your application is the bulb base. Other sizes with a data sheet in iec 60064 are a50 a55 a67 a68 a71 a75 and a80. 1 888 455 2800 fax 1 508 363 2900.

Bulbs with these bases are the most popular of all screw base bulbs. To help you understand what shapes and sizes you will need we have created the following guide on light bulb sizes. Comparison between a15 a17 a19 a21 a23 light bulbs by their dimension. The letter e before a number indicates it s an edison bulb.

The light bulb base and socket are manufactured in a way that predetermines the light bulb s position in the socket.