A lot of the reason I run lights, the biggest and best is NOT so I can see.

For years I occasionally road w/o lights, and recently on occasion I have enjoyed our green way with out lights. It's truly beautiful.

But on the road, I WANT the light all over the place...
Cars come from the most unexpected places.

As for the "wasted" light that sprays upward? Seems to bounce quite well off street signs, and even overhead wires. Again altering cars coming up behind me.

And what do I care about absolute efficiency? There's more then enough to go around. With powerful batteries, so what if 20% or so is wasted? There's far more then I can ever hope to generate with a hub in 10 times the time...

It's too diffuse to blind anyone...

But then these arguments go on and on, and nobody ever sees the other side.
So these are really rational arguments...
They're just dressed up like that.