https://www.visioncenter.org/blog/astigmatism-lights/

But also they're bright enough that they dominate the entire field of view, and mean that you cannot see other smaller, less bright lights of vehicles that may be closer, i.e. if there's a driver with LEDs five cars back but regular cars in front, I can only see a big grey/white patch behind me with those lense flares coming out and nothing from the four cars closer

I also don't know anything about wavelengths but yes, some of them do cause physical jolts of pain when I look in the side mirrors, for the rear-view I have it constantly flicked to the high-beam reduction angle to avoid this, but then I get no LOS of smaller vehicles, bikes or scooters

In addition, I have night blindness from prescribed accutane during my late teen years for acne: https://www.ehealthme.com/ds/accutane/vision-night-blindness/ so I'm kinda all around fucked driving at night

I used to enjoy night driving, it was such a vibe, so many roadtrips and hanging out with friends, so many musicians and bands I discovered listening to the radio at 1am...