Headlight bulbs are made to standard categories so that each one fits exactly the reflector or lens it was designed for. VOLTREK covers the main categories:
| Category | Typical use |
|---|---|
| H1 | Main or dipped beam in lamps with a separate reflector |
| H3 | Fog lamps and auxiliary lamps |
| H4 | Twin-filament bulb: dipped and main beam in one bulb |
| H7 | Dipped or main beam on many European vehicles |
| H11 | Dipped beam and fog lamps |
| HB3 / HB4 | Main beam (HB3) and dipped beam (HB4) in certain lamps |
VOLTREK headlight bulbs are designed for a beam pattern that respects the lamp’s characteristics, vibration resistance and consistent colour temperature. For availability, OE cross-references and trade enquiries, contact us by email.