Standard Lamp Bulb Size

Standard arbitrary a bulbs are the most widely used and thought of when it comes to household lighting.

Standard lamp bulb size.

From top left to bottom right. Light bulb socket sizes chart. Usually both can be used for the same application but remember that the a21 is larger and may not fit on table lamps ceiling fans etc. Place edge of the light bulb to be identified on the top end of the scale and measure the approximate diameter by reading the measurement at the opposite edge of the light bulb.

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. Many have built in ballasts and come in standard or. View standard medium base bulbs. An a19 light bulb is 19 eighths of an inch or 19 8 in diameter.

1 888 455 2800 fax 1 508 363 2900. The most commonly used a series light bulb type is the a19 bulb which is 2 3 8 inches 60 mm wide at its widest point and approximately 4 3 8 inches 110 mm in length. 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 vanity lights. This is the classic shape that most people are used to when shopping for a light bulb.

1 888 455 2800 fax 1 508 363 2900. You can use this handy image below to identify the size of your a shaped bulb. Par bulb type a par lamp can be either incandescent halogen or led and has a built in reflecting surface. Other sizes with a data sheet in iec 60064 are a50 a55 a67 a68 a71 a75 and a80.

To determine a light bulb size use the full size scale shown calibrated in eighths. 60 mm wide at its widest point and approximately 4 3 8 inches 110 mm in length. The a19 and a21 lamps are usually blended due to their similar characteristics. An incandescent light bulb or standard led found in a wide range of home lighting fixtures.

Although a shaped lamps are similar the difference is in size. Bulbs with these base types are available in many different styles. Here is the light bulb socket size chart to help you determine what size do you need your light bulb to be. Common bulbs with e26 e27 bases.