Light bulbs come in many bases to fit different light fittings. The common types of light bulb can be broken down in to groups of bases and are shown here:
Bayonet Cap Bases
- Small Bayonet Cap
- SBC - B15
- 15mm Base Diameter
- Bayonet Cap
- BC - B22
- 22mm Base Diameter
Screw Cap Bases
- Small Eddison Screw Cap
- SES - E14
- 14mm Base Diameter
- Eddison Screw Cap
- ES - E27
- 27mm Base Diameter
Pin Bases
- GU5.3 Cap
- MR16 LV reflectors
- Bi pin – 5.3mm between centre of pins
- Pin dia 1.45-1.6mm
- GU4
- MR11 LV Reflectors
- Bi pin – 4mm between centre of pins
- GU9
- Capsule lamps
- Bi pin – 9mm between centre of pins
- GU10 Cap
- 50mm 230v reflectors
- Bi pin – 10mm between centre of pins.
- G4
- Capsule lamps
- Bi pin – 4mm between centre of pins
- G9
- Capsule lamps
- Bi pin – 9mm between centre of pins
- G53
- AR111 Reflectors
- Bi pin – 53mm between centre of pins
- GX53
- GX53 Cabinet lighting
- Bi pin – 53mm between centre of pins
Bases For Tubular Lamps
- R7S
- Previously halogen, now LED equivalent – floodlights, uplighters
- 78mm and 117mm longa
- G5
- Previously T5 fluorescent, LED equivalent
- 5mm between centre of pins
- G13
- Previously T8 fluorescent, LED equivalent
- 13mm between centre of pins on 25mm tube
- G13
- Previously T12 fluorescent
- 13mm between centre of pins on 38mm tube
Bases For Strip Lights
- S15S
- Found on tubular striplights
- 15mm diameter base4
Compact Fluorescent
Have a look in the bulb section of the website to see what types are available and feel free to contact us if you would like more information.
