Xenon lights
Monkeypants ,had it right. Sorry to be down beat on this but I personally think that this type of overkill lighting so particularly beloved of the German Car industry is quite frankly a killer.
Even on dipped lights or viewed in a mirror the oncoming blue flash renders you blind for a dangerously long period of time, especially on a bike. I have to wear yellow filters specs to protect myself driving at night and the stress on a long journey plus remembering to consciously look at the nearside (which takes phenomenal willpower against the natural urge to look at a bright light) is seriously energy sapping and dangerous.
This should have been legislated against years ago, but it seems the teutonic car men (and now others)can get away with it, check out rule 94 of the highway code.
If you have these lights, and don't get me wrong i believe in good lights, but not at the expense of other road users and above all safety, please reconsider. A normal halogen of 45w is ample, and can fit in the o.e. Miller light.