What Is The Base Size Of A Standard Light Bulb

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

What is the base size of a standard light bulb.

The first letter designates the shape or form of the base and the number represents the width of the base normally in millimeters. Candelabra a smaller screw in base denoted most often with an e12. Standard medium a regular sized screw in base usually denoted with an e26 or e27. 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.

Bulbs with these bases are the most popular of all screw base bulbs. 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. 1 888 455 2800 fax 1 508 363 2900. What are the different light bulb bases.

An important detail that you need to know about the lamp is that it is a21 which refers to the shape and size. 1 888 455 2800 fax 1 508 363 2900. Light bulb socket sizes chart. It may not matter most of the time but in some games.

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 bulbs are the most common light bulb shape so this is what you ll see the most. It has a pear like shape and is typically fitted to either an edison screw or a bayonet cap base. 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.

A shape light bulb base types. The standard household lamp is a19 with a diameter of 2 375 inches and a21 2 625 inches. 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. Shoppers of led light bulbs often confuse the specifications for base type e26 or e27 and bulb shape a19.

This base was developed by thomas edison for the first light bulbs and is still in use today. Here is the light bulb socket size chart to help you determine what size do you need your light bulb to be. The number that follows the a designation indicates the nominal major diameter of the bulb either in one eighth. From top left to bottom right.