As one commenter says,
"Performance sells a 9 led light for under $20. Cateye sells a 11 led light for under $30. Planet Bike sells one with a single high intensity (1 watt) flashing light. All are visible for over a half mile. That gives you 30 seconds to react to the presence of something in the road ahead of you that has a red or amber flashing light. Count out 30 seconds. If you can’t react to something in that time, then you would have already killed yourself driving into the side of a building or a truck."Still, just so damned cool.