LED + Dynohub power , the same wired taillight (German B&M) goes on as soon as the front wheel turns..

lots of prior touts of mounting a bunch of blinking battery lights at the same time .. its your choice.
read back thru past posts ,here and commuting section.

have someone ride your bike and You follow it in a car to see if you are satisfied with its brilliance.


For really Bright, you could put a red lens over a headlight and point it backwards , too.