Until recently, no one made a dynamo powered tail light for seat post or seat stay mounting that was compatible with Busch + Müller or Schmidt head lights. The Secula Plus for seat stay or seat post mounting solves that problem. It has a "standlight" which keeps the LEDs lit for several minutes after you stop.
The Secula Plus lights use B+M's "Linetec" technology in the lens for a very bright and broad light with a large reflector.
Secula Plus lights will work with any B+M or Schmidt LED headlight. They use .6 Watts, requiring the Lumotec headlight to use a 2.4 Watt bulb if paired with a halogen headlight.
Two strand wiring with connectors to the headlight is included.