This article discusses the different types of light bulb bases. It broadly covers what the different light or lamp bases mean, why different lamp bases are used for different lighting applications, and where those light bulb bases are used. Additionally, it provides a light bulb base sizes chart in shareable image format. Light Bulb Base Sizes The biggest light bulb base is one with a diameter between 40mm and 50 mm (E39 or E40). Which is the smallest light bulb base? E11 and E12 are not interchangeable because of their different size. Does the Bulbs Base affect voltage and performance? Bulbs with E12 bases are commonly used for decorative applications, such as chandeliers, wall sconces, Christmas lights, restaurant pendant lights, ornamental lights, residential or commercial string lights, and night lights. Many bulbs with these bases are designed to mimic the look of a candle flame. The screw-in bases, Edison E26 and the larger-sized E27 are usually interchangeable. The medium-sized B22d is also often used with a bayonet fitting.

In addition to automotive lighting, wedge bases are also used in other applications such as outdoor lighting, commercial lighting, and theatrical lighting. They are a popular choice because of their simplicity, reliability, and versatility. COMPACT FLUORESCENT PLUG IN BASES

For example, a T10 wedge base is commonly used in automotive taillights, while a T15 wedge base is used in some turn signal and brake light applications. In North America and continental Europe, Edison screws took the place of other types of bases for general lighting. The three most often used bases in the United States of America for traditional lighting are the E12 (candelabra), the E26 (medium), and the E39 (mogul). Light Bulb Base Sizes Chart

Wedge bases are designed to be easy to use and provide a secure connection. They can be found in a variety of sizes and configurations, depending on the specific application. The large E39 “mogul” base is used on street lights, and high-wattage lamps (such as a 100/200/300 Watt three-way). Chances are you won’t have a need for these guys. The name “Exx” is made up of the letters “E” for “Edison” and “xx” for the millimeter diameter measured across the peaks of the thread on the base (male).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. E26 is the size of most light bulbs used in the U.S. It’s referred to as having a “medium” or “standard” base. The letter “E” in E26 refers to Edison Screw, the most standard of lamp bases, while the numerical “26” refers to its diameter in millimeters (approximately 1 inch).