How to identify E27
- Look for E27 and a voltage marking on both bulb and fixture.
- The nominal thread diameter is 27 mm.
- Treat an imported lamp as an electrical system, not just a socket size.
Where it is commonly used
Imported lampsEuropean fixturesPendant lightsDecorative lamps
Common use is a clue, not proof. The fixture label and model documentation take priority over a visual match.
Bulb shapes sold with this base
You may see these shapes with a E27 base. The base code does not guarantee the bulb width, length, beam angle, or clearance.
Before you buy a replacement
- Do not choose a replacement by physical fit alone.
- Verify the fixture input voltage and the bulb voltage range.
- Use products approved for the country where the lamp is operated.