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.
| 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.