Bicycle Light

Trek Bicycle Light.  This has a handle bar loop for mounting and worked well when I had it on a bike and sometimes rode at dusk.  The whole purpose of this light was to see ahead and avoid danger on the road.  This light did that job well.  It is an incandescent so the brightness is limited. Newer models are preferable since LED lights are much bright and efficient.

Here is a popular LED bicycle light you might consider.