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A-Shape Medium Base Bulbs

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A-Shape Medium Base Bulbs

A-shape medium base bulbs—often labeled as A19 or A21—are the classic, everyday light bulbs most people picture when they think of a standard household bulb. The "A" refers to their traditional pear-like shape, while the medium base (also known as E26 in North America) indicates a standard screw-in base that fits most common fixtures. These bulbs are incredibly versatile and used in everything from table lamps and ceiling fixtures to wall sconces and pendant lights. They’re available in a wide range of wattages, lumens, and color temperatures, making them a flexible lighting option for almost any room in the home.

Today’s A-shape bulbs are commonly available in energy-efficient LED versions, offering the same familiar shape and brightness as old incandescent bulbs but with a fraction of the energy use. They come in dimmable and non-dimmable versions, and many are compatible with smart home systems for added convenience.

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