On the clubrun today, round these parts it was patchy fog all morning, albeit not particularly thick. Pretty well all of us had at least rear LED lights on, a few with front lights too (and they rode on the front).
I'd say the majority of cars had NO lights on at all. And we're talking about small country roads here. Pvicks!
On my way home tonight, in thick fog, i had the fore-sight to go through town, rather than risk the motorway ( turned out to be a good move )
I immediately came across some who had no rear lights on, none what-so-ever, so i assumed that they had no lights on at all. (2014 volvo suv)
I flashed them to let them know, but as I went past as they turned right at a junction, I saw that they had front lights on.
It could be that they had no idea the rear lights were off, but i thought modern cars were supposed to tell you about such trivial failures.
Anyhow, they did't get rear-ended by me, thankfully.