Ya, we got to be vigilant on the road. Like the cyclist you posted before, no moment a visibility is going to help that guy when he is so kum gong to cheong during red light while the cars are already moving. Situation awareness is a must.
But irritating, till causing momentary blindness to opposing traffic is already a no and inconsideration. if you are trying to justify high beaming opposing traffic.
Just some further details....
I have 1 front light with hi-beam function, it's not very high in lux....... it's used for other road users on their mobile phones (cyclists / walkers). I find that just a brief flash would do. I don't mind changing direction and be on my way, but risk is that the other fella might inadvertently get into my intended travel direction, simply coz he/she is on his phone so he isn't even seeing where they are going and not walking in a straight line even.
Actually i just kena 1 case like this last nite, a fella on his phone last night, he walked perpendicularly into the cycling path and stopped right there right in the cyclingj path outside Guoco Twr @ Tg Pagar MRT there, i flashed and rang bell, bo bian.
the cycling path no less, not shared path (over there got 2 paths)
This is rare of course, issue is that i am out there for too many hours coz fair amount of hours is recreational. Like 20 hours per week, as if every day also su[er long run.
For road cycling (not a high % anyway, mainly to go home or to get to a location during off-peak hrs), it would never be too blinding for day time unless you go super duper crazy with the lights and that is not easy, and rear is always higher risk.
As mentioned, a good comparison is car headlights and car tail brake lights as a minumum.
The vast majority of bicycles and even motorbikes really not there yet. For day time, the car really is a much bigger target, just to use lights to get/grab the attention of other road users is difficult for non-specialised lights.
