I have thought about putting an led strip under the dowtube to provide side lighting on my commuter bike. I only see a need for it in urban areas. But really, the thing that will keep a rider safe from cars approaching from the side is a helmet light. Drivers in this area are not prepared to stop for a stop sign if they didn't see headlights approaching from the side. Bicycle headlights just don't cut it for this, so they get a helmet light in the face.