Standard Light Bulb Base Size

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.

Standard light bulb base size.

The candelabra e12 has a diameter of 12 millimeters. E17 north america e14 small es ses in europe medium or standard. Bulbs with these base types can be used interchangeably as there is only a 1 millimeter difference in base size. Unlike the light bulb shapes the number in the light bulb base measures the light bulb base diameter in millimeters.

Screw bases come in several sizes and they are referred to by both a descriptive name and size. E26 is the size of most light bulbs used in the u s. E12 north america e11 in europe intermediate. 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.

E17 intermediate base is in between these two sizes. The first letter designates the shape or form of the base and the number represents the width of the base normally in millimeters. There are four commonly used thread size groups for lamps. The a series light bulb is the classic glass light bulb shape that has been the most commonly used type for general lighting service gls applications since the early 20th century.

This base was developed by thomas edison for the first light bulbs and is still in use today. It s referred to as having a medium or standard base. Standard arbitrary a bulbs are the most widely used and thought of when it comes to household lighting. It has a pear like shape and is typically fitted to either an edison screw or a bayonet cap base.

It s used for nightlight bulbs and sometimes for decorative light bulbs used in chandeliers and over bathroom mirrors. E26 mes in north america e27 es in europe mogul. 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. A19 led filament bulbs in ceiling fan fixture a21 led bulbs in bedroom lamps a19 gold tint led filament bulb in porch light fixture a19 led fireworks bulbs in string lights.

E12 is the smaller candelabra base. Bulbs with these bases are the most popular of all screw base bulbs.