H4 is a twin filament bulb. It performs both the dipped and main beam function in a single bulb.
This is the first switch on your headlights and is a small bulb that you would normally use whilst parking or at dusk.
Daylight running lights are strips of LED lights, which you can fix to your vehicle for increased safety and styling.
The car headlight bulbs fittings for your OPEL ASTRA are displayed above. To see more information about what the different bulbs are, just hover over the type for a short description.
Once you’ve selected which bulbs you wish to replace, you’ll be asked about the kind of bulb you’re after. This’ll help us to suggest a bulb which best meets your requirements.