Different Light Bulb Base Sizes

The industry uses many terms for the same size.

Different light bulb base sizes.

There are many light bulb base sizes available. E obviously is for edison. On our website we refer to our bulbs and string lights as c7 c9 and medium. The size of the bulb base appears right next to the base style on the packaging in the form of a number.

The most familiar is the edison screw base found on most incandescent bulbs and many halogen compact fluorescent hid and now led bulbs. However because the light industry likes mysterious codes you may also see e26 e12 e39 etc. E26 bulbs are primarily used in north america while e27 bulbs are most. There are hundreds of unique bases for light bulbs.

1 888 455 2800 fax 1 508 363 2900. Common bulbs with e26 e27 bases. A19 a15 a21 br bulged reflector spotlight and floodlight bulbs. You can find this base on bulbs such as the t6 s11 and r12 but you will have to do a lot of searching to find these bulbs.

Bayonet medium by22d index double contact bayonet wedge bases. The size of a bulb base is determined by measuring the width of the base in millimeters at its widest point. For example a lamp with a medium base or e26 measures 26 millimeters 1 02 inches at its widest point on the base. The common terms are medium intermediate candelabra and mogul.

The following is a list of common basic types presented on a size lamps. Therefore a light bulb described as a gu 10 base will feature a 10 millimeter wide base. This light bulb base is not very common and most often found on much smaller bulbs. Shop by screw base with our universal bulb finder e26 e27 medium edison 26 mm or 27 mm diameter.