I thought I'd been flashed by a speed camera a while ago.
It was actually the battle tank behind with it's ludicrously bright LED's that was flashing a driver pulling out of a side road
.
And when they come towards you with full beam on......
Maybe 6V standard bulbs should make a come back? At least when you can't see when you're going it slows you down. And we all know that speed kills.....