When I got round to buying a new H6W this weekend, I bought two, with the idea of trying one of them in the headlight. Well, I have to tell you all, it has transformed the second headlamp unit from a rather dissapointing orangey glow to a decent, bright white light. I'm well happy. Been out tonight for an hour and no adverse effects from the slightly higher wattage.
I have absolutely no idea why BMW put such a poor excuse of a bulb in the front headlamp, and a decent one in the number plate light. Seems ar$e about face for me.
So if any of you want to brighten up that parking light/ side light in the second headlamp unit, get out there and buy a new H6W bulb and swap it. You won't be dissapointed. Especially the Northern Hemisphere guys that ride all year round. I hardly ever ride in daylight these days