What Is The Base Size Of A Standard Light Bulb

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.

What is the base size of a standard light bulb.

The standard household lamp is a19 with a diameter of 2 375 inches and a21 2 625 inches. Here is the light bulb socket size chart to help you determine what size do you need your light bulb to be. Standard arbitrary a bulbs are the most widely used and thought of when it comes to household lighting. A19 bulbs are the most common light bulb shape so this is what you ll see the most.

Candelabra a smaller screw in base denoted most often with an e12. From top left to bottom right. 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. Bulbs with these base types can be used interchangeably as there is only a 1 millimeter difference in base size.

This base was developed by thomas edison for the first light bulbs and is still in use today. 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. The first letter designates the shape or form of the base and the number represents the width of the base normally in millimeters. Screw in bulbs use a base called an edison screw or es base.

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. Light bulb socket sizes chart. What are the different light bulb bases. 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.

An important detail that you need to know about the lamp is that it is a21 which refers to the shape and size. Standard medium a regular sized screw in base usually denoted with an e26 or e27. 1 888 455 2800 fax 1 508 363 2900. The number that follows the a designation indicates the nominal major diameter of the bulb either in one eighth.

Bulbs with these bases are the most popular of all screw base bulbs. Shoppers of led light bulbs often confuse the specifications for base type e26 or e27 and bulb shape a19. It may not matter most of the time but in some games. The most common light bulb base types are.