What is an E12 Bulb?

An E12 light bulb is a type of bulb with a screw base that measures 12 millimeters (about 1/2 inch) in diameter. The “E” stands for Edison, referencing Thomas Edison’s original design for screw-in light bulbs. The “12” refers to the base diameter in millimeters. This type of base is also called a candelabra base, as it’s commonly used in decorative lighting.

E12 light bulb

Feature E12 Bulb E26/E27 Bulb E14 Bulb (Europe)
Base Diameter 12 mm (candelabra) 26 mm (medium) 14 mm (European candelabra)
Common Use Decorative (chandeliers, sconces, fans) General lighting (lamps, ceiling fixtures) Decorative, smaller fixtures
Shape Variants Globe, teardrop, flame-tip Standard, globe, floodlight Candle, small globe
Brightness Range 100–800 lumens 300–1600 lumens 100–600 lumens
Energy Efficiency High (LED options available) High (LED options available) High (LED options available)
Interchangeability Not interchangeable with E26 Not interchangeable with E12 Not interchangeable with E12/E26

While E12 bulbs are often used indoors, some are also rated for outdoor decorative fixtures—ideal for string lights on patios or garden pathways. Always check the product’s IP rating to ensure it’s suitable for outdoor conditions.

Additionally, E12 bulbs often come with dimmable options, allowing you to control the light output for different moods or settings. Make sure to pair them with compatible dimmer switches for optimal performance.

The post What is an E12 Bulb? appeared first on Homedit.



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