And is not just in the US, in the UK Lezyne have a setting on their rear lights that they "as being for daytime use Anderson not be used at night
Not just UK. Some German-spec dynamo lights have a daytime running light mode that is too bright to be legal at night (so they have daylight sensors which turns it down at night).
How long before the high viz police and motoring lobby decide that daytime running lights are are essential for cyclists
As soon as they think it won't fail the laugh test.
[QUOTE 4046508, member: 9609"]and a none cyclist who skipped through it.
because I am moving relatively slowly, and as a driver I find that info very useful[/QUOTE]
Yes, but sadly, cyclist-motorists might react well to the information, but most of us also cope fine if we see a cyclist later and the Ronnie Pickerings of this world might take it as a signal that they can disregard the cyclist. Much better to make them think you might be a motorbike or e-bike that'll leave a bigger dent: single bright steady lights front and back, and no clothing that can be identified as "cyclist" quickly.
(Thanks for pointing out the leg wasn't just broken - edited to correct. I still can't quite believe the fine.)