1. People drive 100% of the time with their brights on (city driving, even in residential areas).
2. People modify their lighting. I saw a truck last night with red, blue, and extremely bright yellow lights on the front and no lights on the back.
3. Some cars are designed with an option to have running lights on in the front and none in the back. I often see this on the freeway at night. Why would that ever be an option? What setting produces that?
4. "Low Beams" are so bright they will blind you in the daylight.
My 2021 Ford F-150 has the feature where she turns on lights as needed and dims them when another car approaches. She does it with plenty of time to not blind any oncoming drivers.
I like the feature. No one has flipped me off...yet! :)
Those are the Daytime Running Lights, DRL. If people have a vehicle with the DRLs but do not have, or have turned off, their auto-on headlights, they will end up running at night with only those DRLs on.
If you have DRLs most insurance companies give you a small discount.