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What Is an E27 Lamp Holder?
An E27 lamp holder is designed for the most common Edison Screw (ES) bulb base used worldwide. The “27” refers to the bulb base diameter, which measures 27 mm. Because of its versatility and wide compatibility, E27 fittings are widely used in residential, commercial, and decorative lighting applications.
In addition to traditional incandescent bulbs, E27 lamp holders are compatible with LED bulbs and compact fluorescent lamps (CFLs), making them a practical choice for modern lighting systems. E27 typically operates on 240V electrical systems, similar to the B22 bayonet cap standard.
We also supply other lamp holder sizes, such as E14 SES, E40 GES, as well as selected 120V E26 and E12 components for different international markets. However, availability may vary depending on bulb shape and region.
Common Lamp Holder & Bulb Base Types
| Base Type | Voltage | Size | Name / Description |
|---|---|---|---|
| E5 | 18V | 5 mm | Lilliput Edison Screw (LES) |
| E10 | 30V | 10 mm | Miniature Edison Screw (MES) |
| E11 | 120V / 240V | 11 mm | Mini-Candelabra Edison Screw |
| E12 | 120V | 12 mm | Candelabra Edison Screw (CES) |
| E14 | 240V | 14 mm | Small Edison Screw (SES) |
| E17 | 120V | 17 mm | Intermediate Edison Screw (IES) |
| E26 | 120V | 26 mm | Medium Edison Screw (ES) |
| E27 | 240V | 27 mm | Medium Edison Screw (ES) |
| E39 | 120V | 39 mm | Goliath Edison Screw (GES) |
| E40 | 240V | 40 mm | Goliath Edison Screw (GES) |
| BA9 | 240V | 9 mm | Miniature Bayonet Cap (MBC) |
| B15 | 240V | 15 mm | Small Bayonet Cap (SBC) |
| B22 | 240V | 22 mm | Bayonet Cap (BC) |
| G4 | 12V | 4 mm pin spacing | Bi-Pin Halogen/LED Capsule Base |
| G9 | 230V | 9 mm loop | Loop Pin Capsule Base (Halogen/LED) |
| GU10 | 230V | 10 mm twist-lock | Twist & Lock Spotlight Base |
| MR16 | 12V | 50 mm reflector | Low Voltage Reflector Lamp Base |
You will have a better understanding based on the picture below!
Understanding these different lamp holders and bulb base types helps ensure correct compatibility, safe installation, and optimal lighting performance for both residential and commercial lighting projects.