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Fair enough - my beam isn't quite focused enough to be able to determine a clear 'top', so I just angle it down enough that people coming the other way only go half-blind instead of fully blind...
Also you'll be glad to know I don't use the flashing mode at night. I have used it before during the daylight though, where the steady light is completely unnoticeable despite it being a pretty strong light.
Uh mate, if I point my light 25m ahead of me, you WILL get blinded. Totally blinded. I'm pointing it about 4-5m ahead of me, that's about the right balance for these lights.