Blue headlights

[Fazerider]

Major: I don't understand, why not have the left beam on all the time?

Because after you've adjusted it to point straight ahead you wouldn't want it still lit when you're supposed to be on dip beam.
In any case; seeing what's on the road 20 meters ahead isn't the problem. One filament is good enough for that.
Its spotting deer in the undergrowth that's the problem. :eek

I guess you must live in a more remote area or ride at quieter times than me. As a shift worker half my riding is at night, but there is still enough traffic that I rarely have the opportunity to use main beam for more than a few seconds at a time... a good dip beam is far more important from my point of view.
I agree deer are a menace though, one ended my brother's motorcycling... and I was glad the snowy weather caused me to use the cage a couple of weeks back: