How do I tell which type of bulb I need in a spares set for European motoring? I have looked in my manual but that just says something like "replace with a bulb to the same specs as marked on the bulb body". My car is a 2006 (New Shape) Vauxhall Zafira 1.6 Life (petrol). As far as I can tell they are standard halogen not Xenon(?). Cheers John