The ACID Dynamo Front Light PRO-D 50 CMPT for hub dynamo bikes boasts a handy auto-on function that automatically switches on your lights when the daylight fades. And the 'standlight' function stays on when you stop for added safety and visibility in traffic. It also comes with a reflector that complies with German road traffic regulations (StVZO) and the Fork Bracket Universal HPP for securely mounting the 50 lux light. See and be seen!