have the lamp used about 4 years at my winter bike and was only mediocre satisfied because I was used to my much more frequently occupied trekking bike with hub dynamo and 40 lux headlamps considerably more. Since the switch now increasingly on strike, I have indulged in something really good also for Winterrad me. Busch & Müller LED headlamp Ixon IQ !!! Already after the first Dark / night drive me, the significantly higher price no longer bother as to what there is now lit, the ellipsoid is just murky .....