When light on the bicycle should not save you

The Busch & Müller products are expensive. But they're any good. Whether you take the products with integrated battery or with cable and an external battery, the one attached with Velcro on your bike. The light is blinding light. The LED power consumption is low. Subjectively, the battery operating time. The low discharge currents also lead to less aging batteries. Taken together, a great product.
I would like to highlight the taillight. This is also of decent quality concerns what brightness and operation. It also has the nice whistle that it has a position sensor and "remembers" when the bike is parked. After 4 minutes, it switches off then. Pleasant is also the light sensor. The unit "remembers" when it gets dark and switches on when movement. But especially good is the construction of the housing. You can not just take off and steal the taillight. Without a special key (no hex, but Torx) can return light not lose weight without destroying it. Disadvantage: It works only with batteries in a rare size. But these are not expensive. Approximately 20 cost about 11 euros and lasts a long time.
Total price-performance super and therefore five stars.