i was only referring to rear lights.simonineaston wrote: ↑27 Sep 2021, 11:44amI can imagine that effect would probably withstand scientific scrutiny. I wonder if anyone's done that sort of research. The trouble is, as has been suggested upthread that the sort of light that's visible in daylight, is also likely to be so bright as to have negative effects on those who may look into it, at night.My entirely personal feeling is that I get given more room from passing vehicles when I show a flashing daytime light on fairly narrow Welsh A and B roads.
I'm at my wit's end to work out what goes through some bike/light users minds that I meet on cycle paths - not so bad on roads as the angle between oncoming bikes is wider. Surely it must have dawned on them that the super-bright light they have sort out has 2 connected properties 1) they are highly visible and 2) they can and often do, dazzle the oncomer, or follower, regardless of the type of vehicle the party is using, thus making it harder for them to see where they are going !! Same is true, but to a lesser degree, when said lights are used in daylight.
I use one "bog standard" 3 LED type.
It's quite bright but not blinding.
Three settings. Constant. All 3 flashing. And an across the light type flashing.
I consider flashing an advantage over constant, for a number of reasons already stated by others in the thread.
I do have a similar type of front light, that is cheap but bright enough to negociate unlit lanes.
I sometimes use a flashing mode in daylight. It is done and decided on the basis of prevailing road conditions.
Otherwise just as a normal light at night.