Standard North American Light Bulb Base

The designation exx refers to the diameter in millimeters even in the u s where the bulb glass is listed in eighths of an inch.

Standard north american light bulb base.

Screw base bulbs often called edison bulbs are named after their inventor thomas edison. The e indicates an edison screw base and 26 is the diameter in millimeters. E17 north america e14 small es ses in europe medium or standard. The us 120 volt screw base is an e26.

In the us standard household light bulb bases are also called medium screw base presumably to distinguish them from mogul considerably larger bases than medium screw base candelabra base considerably smaller bases than medium screw base and mini candelabra even smaller than candelabra base the designation a19 does indeed refer to the style and size of the glass. In 120 volt north america and 100 volt japan the standard size for general purpose lamps is e26. E12 north america e11 in europe intermediate. There are many different standards for lampholders including early de facto standards and later standards created by various standards bodies.

Click on any of the illustrations to view a list of bulbs with that light bulb base. Screw in bulbs use a base called an edison screw or es base. This base was developed by thomas edison for the first light bulbs and is still in use today. For bulbs powered by ac current the thread is generally connected to neutral and the.

The e26 is the standard 120 volt american base. E26 mes in north america e27 es in europe mogul. A lightbulb socket light socket lamp socket or lampholder is a device which mechanically supports and provides electrical connections for a compatible electric lamp. There are four commonly used thread size groups for lamps.

Use this handy guide to identify different types of light bulb bases that apply to incandescent halogen high intensity discharge fluorescent and led light bulbs. It was developed by thomas edison patented in 1881 and was licensed in 1909 under general electric s mazda trademark. Each base type has a descriptive term such as medium intermediate candelabra etc and they re defined by the letter e edison followed by numbers. The e27 is the european variant and is rated at 220 volts.

Bu here is the technical correct names. Edison screw es is a standard lightbulb socket for electric light bulbs. However an e26 bulb can fit in e27 base and an e27 bulb can fit in e26 base without problem. In north america and europe these light bulb base types are the most common and widely used.

E26 is 26 mm and the e27 is 27 mm diameter. Sockets allow lamps to be safely and conveniently replaced re lamping.