After the first exit I can actually be satisfied: the luminosity corresponds at night almost a car headlight, which of course involves the danger of blinding oncoming cyclists with them. Through the clever method of attachment by means of a screw, the lamp can however be easily lowered and raised again. The illumination forward is great (loose twice the stopping distance), much faster than 30 km / h but you should not go. The side illumination is enormous - obstacles are well recognized. The two light levels range from - 10 lux for city operation with lighting by street lamps, 80 lux for the absolute darkness. Also great is the automatic lowering of the light intensity with a lower battery level, the speed is in any case to reduce in the dark a lot. The burn time depends on the battery or batteries used, can not be evaluated after a single use. Should loud test at roadbike.de (Test result: outstanding) go up to 5 hours. Installation was pretty easy, with thicker arms with the supplied Gummiunterzug is too thick. The total weight is almost doubled by four AA batteries. Unfortunately, the glass was (rather plastic) easily jumped. Since I ordered the last piece, I did not want to return, but actually belongs here a points deduction. Conclusion: Practically, provides security, easy to assemble, is worth the money.
