The best all-around commuter dynamo headlight. At 60 lux it's bright enough to light up the darkest street, and with a 6 led day time running light, it's also incredibly bright during the day, increasing your visibility and safety.
The senso feature allows the running light to operate during the day, and when it gets dark it will automatically sense it and turn on the bright night-time head light.
All Busch and Muller lights have a stand-light, which allows the lights to remain lit for a few minutes when you come to a stop, such as at a traffic light.
This light requires a 6v 2.4w dynamo or a 6v3w one if you're using a taillight.