Lexicon: L
Lamp Base Types Explained
What Is a Lamp Base?
The base is the connecting element between a light source and the lamp holder in a luminaire. It establishes the electrical contact and provides mechanical support. The base type must match the lamp holder of the luminaire.
The Most Important Base Types
Screw Bases (Edison Bases)
- E27: The large screw base (27 mm diameter). Standard for most table, floor and pendant luminaires.
- E14: The small screw base (14 mm diameter). Widely used for candle lamps, globe lamps and small decorative luminaires.
Pin Bases
- GU10: Mains-voltage pin base with twist-lock mechanism. Widely used for reflector lamps in spots and recessed luminaires.
- G9: Compact pin base for small, high-output light sources in design luminaires.
- GU4 (MR11): Low-voltage pin base for small reflector lamps.
- GU5.3 (MR16): Low-voltage pin base for larger reflector lamps.
Linear Bases
- R7s: Linear base for halogen linear lamps – widely used in uplighters and work floodlights.
Frequently Asked Questions (FAQ)
How do I find out which base my luminaire has?
The base type is usually indicated on the luminaire, in the operating instructions or on the existing light source.
Do LED light sources fit all lamp holders?
Yes, suitable LED retrofit light sources are available for virtually every base type. Pay attention to the dimensions, as LEDs may differ slightly from the original measurements.
In Summary:
The correct base type is the fundamental prerequisite for using a light source in a luminaire. At Leuchtenland.com you will find LED light sources for all common base types – clearly sorted by E27, E14, GU10, G9 and more.