See and be seen: The ACID PRO-D 100 front light is a high-end dynamo light packing 100 lux of lighting power. The light comes completed with a K-reflector, GoPro-compatible universal adapter, and fork mount universal HPP included. The sensor-controlled auto on-off function keeps visible in traffic during the day with its 15 lux daytime running light. The light switches to full power automatically when the ambient light fades to darkness. Additionally, the light comes standard with a parking light feature to keep you visible while at the traffic light.