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There is very little about car light bulbs as a whole subject anywhere, I have driven Vauxhall's for many years and decided to do a guide about bulbs used in Vauxhall cars. However, the information that I compiled in the guide probably refers to most cars.
So although it is headed Vauxhall it should be helpful for most brands.
VAUXHALL USE BULB SIZE INFORMATION
Bayonet Type Bulbs
P21W Single Filament, In Line Pins Designation : Type 382
PY21W Single Filament, In Line Pins Designation : Type 581
PY21/5W Double Filament, Off Set Pins Designation : Type 380
P21/4W Double Filament, Off Set Pins Designation : Type 566
TW4 Single Filament, In Line Pins Designation : Type 233
434 Single Filament, In Line Pins Designation : Type H6W
Head Light Bulbs
Full Beam H1 Single Filament, 1 Pin, 22mm Base Designation : H1
Full and Low Beam H4 Double Filament, 3 Pins, 43mm Base Designation : H4
Low Beam H7 Single Filament, 2 Pins, 30mm Base Designation : H7
Halogen Headlights
Full and Low Beam H15 Double Filament, 3 Pins, 35mm Base Designation : H15
Full Beam HB3 Single Filament, 2 Pins, Right Angle 30mm Base : HB3
Low Beam HB4 Single Filament, 2 Pins, Right Angle 30mm Base : HB4
HID and Xenon
HID and Xenon Bulbs can be found in most Headlight sizes.
BUT they are only Road Legal in the UK if they are Factory Fitted.
LED Lights
LED Bulbs can be found in most of the above sizes.
BUT they are only Road Legal in the UK if they are Factory Fitted
Or they must be for Interior Use Only.
So although it is headed Vauxhall it should be helpful for most brands.
VAUXHALL USE BULB SIZE INFORMATION
Bayonet Type Bulbs
P21W Single Filament, In Line Pins Designation : Type 382
PY21W Single Filament, In Line Pins Designation : Type 581
PY21/5W Double Filament, Off Set Pins Designation : Type 380
P21/4W Double Filament, Off Set Pins Designation : Type 566
TW4 Single Filament, In Line Pins Designation : Type 233
434 Single Filament, In Line Pins Designation : Type H6W
Head Light Bulbs
Full Beam H1 Single Filament, 1 Pin, 22mm Base Designation : H1
Full and Low Beam H4 Double Filament, 3 Pins, 43mm Base Designation : H4
Low Beam H7 Single Filament, 2 Pins, 30mm Base Designation : H7
Halogen Headlights
Full and Low Beam H15 Double Filament, 3 Pins, 35mm Base Designation : H15
Full Beam HB3 Single Filament, 2 Pins, Right Angle 30mm Base : HB3
Low Beam HB4 Single Filament, 2 Pins, Right Angle 30mm Base : HB4
HID and Xenon
HID and Xenon Bulbs can be found in most Headlight sizes.
BUT they are only Road Legal in the UK if they are Factory Fitted.
LED Lights
LED Bulbs can be found in most of the above sizes.
BUT they are only Road Legal in the UK if they are Factory Fitted
Or they must be for Interior Use Only.