Thanks Kaiser,
That is very interesting. Have you had any issues caused by the fitting of your new bulbs? I am not an auto electrician and don't try to understand the electronic complexities under the bonnet but is the standard wiring setup man, sorry non specific gender enough, to except more powerful bulbs?
Our van was an ex demo so we had no choice over the lighting but I am not sure that I would have ordered an upgrade if I had that facilicity then. The story is different now. These bog standard lights are some of the worst headlights that I have encountered in the last few decades and I can't understand what they are doing on a vehicle of this value.