The HID headlamps bother me even in the daytime, and especially
off-axis. I see them as very purple, and they are demon bright --
enough that I have to look away even in daylight. I'm bothered by cars
in the daylight on the other side of a divided highway, for instance.
I suspect the real solution is to filter off the near-uv emission (the
high blue end) that extends beyond the typical human vision range.
Some of us see that, and the output on those lamps is very very bright
in the blue and near-uv range.
Beam pattern is secondary, unless they are the old single beam type,
where they are indeed high beam only.
The Euro MB pattern is really cool -- the beam sweeps away from the
opposing traffic dramatically, easily visible on a garage wall. That
helps,
Peter
