Who is talking about "blinding drivers". As I said above, I can actually see where my light is going. The chances of my "blinding" a driver is basically nonexistent. My beam doesn't spread over into the lane of on-coming traffic. I'm not riding at the center line of the road. I'm 10 to 15 feet (3 to 5 m) away from the driver of a car. If...and that's a big "if"...my lights are focused on the ground 10 m (32") in front of me, the radius of my light is 0.5 m at the outside. I'd have to have super wide flood lights to "blind" a driver 10 meters away.

And even that would be a problem because the more "floody" a light is, the less it can "blind" someone. Lux, remember, is light intensity/area. So the more area, the less intensity.

There is a difference between trying to "blind" a driver and getting noticed. Lights on cars are there so that the driver can see the road but they are also there so that others can see the car. Should we cyclists ride invisibly so that we don't harm those poor drivers? I guarantee that they don't know or care what their lights do to us.