Enlighten / Enlighten

We have a light both in front and behind a bike. when there is a lot traffic on the street, the car driver can not distinguish the bike light from all the other lights( rear lights of a car, the traffic light, the light from the house, from all the other decoration of the street).

This LED light make our back as a blackboard, make the sign biggest. In this case, the car driver can always see the biker.

The principle is the same with the normal bike light, the energy is from electrification by friction