Light Bulb Base Sizes

Bulbs with these bases can be used interchangeably as there is only a 1 millimeter difference in base size.

Light bulb base sizes. For a short time early on these mini lights were manufactured using e5 screw bases. Here is the light bulb socket size chart to help you determine what size do you need your light bulb to be. Understanding common household light bulb shapes sizes and styles is important whether you re converting outdated incandescent fixtures into energy efficient ones or using led bulbs for new construction applications. 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.

These powerful bulbs have high light output and are used to replace hid bulbs in industrial fixtures such as high bay warehouse lights parking lot lights canopy lights and wall packs. The size of a bulb base is determined by measuring the width of the base in millimeters at its widest point. Light bulb bases also come in a wide variety of sizes. A light bulb s series indicates its shape followed by a number code that indicates the light bulb s diameter in millimeters or one eighths of an inch depending on the type.

Light bulb socket sizes chart. The first letter designates the shape or form of the base and the number represents the width of the base normally in millimeters. 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. Types of light bulbs bases.

Christmas lights use various base sizes e17 for c9 bulbs e12 for c7 bulbs e10 for decades old series wired c6 bulb sets in the u s and an entirely different wedge base for t1 mini lights. All base types regardless of shapes or style follow the same measurement type. The exception is the gu24 base with a double base that requires a type of twist and lock. Most a shaped lamps have a screw base e12 e17 or e26.

1 888 455 2800 fax 1 508 363 2900. This guide is organized by series with information about other common names sizes including light bulb size charts for each series typical uses and popular caps.