24-05-20, 09:21 AM
The bulb type will make little real difference to the pattern/spread you get on the road at distance, as this is determined by the reflector. The reflector is matched to the bulb, the position of the filament or point where the light is made is crucial just a few mm out and you lose the pattern/spread. This is one reason we are seeing a lot of dazzling. H7s can quite easily not be seated correctly, which moves the filament position, the same applies to non adjustable LEDs fitted into reflector headlamps. The light source is in the wrong position, yes you get more light by looking at them but it's not concentrated into the correct pattern/spread.
A H4 bulb in a H1 reflector might work ish on low beam, but not on high as the filament position will move and the reflector is set for a single filament, i.e. no movement.
A H4 bulb in a H1 reflector might work ish on low beam, but not on high as the filament position will move and the reflector is set for a single filament, i.e. no movement.
Later