Standard Bulb Base Sizes

Screw in bulbs use a base called an edison screw or es base.

Standard bulb base sizes.

The first letter designates the shape or form of the base and the number represents the width of the base normally in millimeters. 7 8 7 8 diameter. 10 8 1 1 4 diameter. A further explanation of the light bulb base sizes you can look at the letter number references e12 e17 and e26 to help understand a bulbs base style and size.

Numbers in each code refer to the bulb s diameter in one eighths of an inch. 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. E26 is the size of most light bulbs used in the u s. 8 8 1 diameter.

Langree a19 led light bulb 6w equivalent 60 watt 2700k soft white e26 medium base led bulb non dimmable standard replacement pack of 6 4 7 out of 5 stars 192 13 99 13. 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. Here is the light bulb socket size chart to help you determine what size do you need your light bulb to be. 1 888 455 2800 fax 1 508 363 2900.

It s referred to as having a medium or standard base. Bulbs with these base types can be used interchangeably as there is only a 1 millimeter difference in base size. Depending on their size these bulbs can be used in applications ranging from chandeliers wall sconces and pendant lights to basement and garage troffer light fixtures. A little larger than the.

Most of the light bulbs that you buy in stores or online are going to have this kind of base. E17 intermediate base is in between these two sizes. E12 is the smaller candelabra base. Fluorescent pin bases miniature bipin medium bipin single pin recessed double contact 4 pin single ended 4 pin 2gx 13 axial twist lock bases 10mm gu10 10mm gx10 24mm gu24 bi pin bases 4mm g4 4mm gu4 4mm gz4 5 3mm g5 3 5mm g5 5 3mm gu5 3 5 3mm gx5 3 5 3mm gy5 3 6 35mm g6 35 6 35mm gy6 35 6 35mm gz6 35 8mm gy8 8 5mm g8 5 9mm g9 9mm g9 pin.

It s used for nightlight bulbs and sometimes for decorative light bulbs used in chandeliers and over bathroom mirrors. Light bulb socket sizes chart. Some common bulbs that use this base are appliance bulbs or desk lamps. Bulbs with these bases are the most popular of all screw base bulbs.