We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is a Wedge Base?

Mary McMahon
By
Updated May 17, 2024
Our promise to you
About Mechanics is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At About Mechanics, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A wedge base is a style of light bulb design where wires run from the bulb and up the sides of the base to come into direct contact with the socket. This design is less expensive to produce than other variants, like the Edison screw. Some manufacturers prefer it for certain lighting applications, particularly miniature light bulbs and halogen bulbs, many of which come in the wedge base configuration. Bulbs with this design will not fit in sockets designed for other styles of base.

One of the most common examples of the wedge base is used in Christmas lights, also known as fairy lights. The wires from each light protrude from the base and fold up, along the sides of the wedge. Users can pull on the lights to release them from the socket, and push to insert them, with no need to turn bulbs or use a special device to insert or remove them. These lights are very easy to replace in addition to being highly inexpensive.

Without a wedge base, a light bulb would need a cap to seat it securely in a socket. Caps add materials, which increase the cost of the bulb. They also increase the amount of time needed for construction. For bulk production of extremely small bulbs, this may not be practical, as the per-bulb price to consumers might be more than they are willing to pay. For this reason, manufacturers may opt to produce wedge base components for some fixtures.

Some types of automotive lighting also use this design. It is possible to fit bulbs with multiple filaments, if necessary, to accommodate high and low light settings. These wires run up different parts of the base to avoid crossing and typically the base has a profile that only allows it to be inserted in one direction. This ensures that the wires will not be switched during installation, allowing the light to work correctly.

Lamps and other fixtures designed for wedge base light bulbs may indicate this on their package, and have a distinctive socket. Replacement bulbs for lamps and other items are typically readily available through hardware, home supply, and automotive stores. In some cases it may be necessary to special order a bulb of a particular wattage, or a highly specialized bulb designed for a very specific piece of equipment. Car lights, for example, are often specific to the manufacturer and sometimes different models also have distinct bulbs.

About Mechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a About Mechanics researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments

Mary McMahon

Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

Learn more
About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.