Lights in Holland used to have a minimum of 3Watts for a incan light. Dunno what the status is at this moment.
We have a lot of seperated roads for cyclists which makes it a lot safer. But I prefer blinking lights over anything! I don't care how far away they are, as long as I can spot them on time!
The biggest issue for me are scooters/moped/bike lights that put out a lot of lumen and try to illuminate the sky! right in to my eyes. Several times I had to stop with my tiny car (nissan micra, it IS small) because I couldnt see behind the light. But when I put on my big lights, they get angry! strage people
But everything is better than a biker without light and with dark clothes. You could run them over without noticing besides the bump.
I don't bike a lot anymore, but I like to walk long distances, especially in the evening/sunset or early moring. See birds, animals, enjoy nature etc. etc. I don't like to wear reflective vests but I do use some sort of light. A simple 6P with a red filter can do the job, although I like to use a M3 as well
. If a car approaches I just flash a couple of times and the don't know how to get back to the proper speed limit! And than pass me at 5/10 km/h. Works like charm.