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I had to quit my CDL OTR job because the high intensity discharge headlights were so bright that it started causing ocular migraines that would black out my field of vision after a year of night driving. It took years to recover and I’m finally able to drive without nighttime glasses. The lights themselves are very dangerous and I think more car manufacturers should look into this. 
My 2022 Forester has headlights that seem to “cut off” right about hood level. So if I’m driving behind a sedan, I’m not blinding them in their rear view mirror. It also has auto dimming bright lights and will turn off the high beams when it senses another car coming towards me. All that said, some times I think the auto level of my own headlights are too bright for other drivers. It’s just ridiculous how bright these headlights are, especially when people turn on after market light bars while on the pavement…how far are you trying to see? Into the future?!
It's so bad especially driving through the country and you see these big ass lights headed your way and it's the ONLY thing you see >

Think it's bad in the country. Imagine being stuck in front of one and having to tilt all your mirrors for your 40 min. commute ... sometimes the same one several times a month. >

LPT: You can flip the tab on the bottom of your rear view mirror to deflect the light away from your eyes while maintaining the same view out your rear windshield.
ULPT: You can also angle it in such a way that the person behind you gets an eye full of their own headlights. >

The little tab on the bottom is a thing of the past in newer vehicles but when I did have the option I always tried to blind them with it haha >

Huh. Didn't know that. I had a 2019 Civic that still had the tab. I too like flipping the tab and having the roving searchlight behind me suddenly turn their brights off or back off considerably lol >

LEDs are more efficient. All headlights should be LEDs. But they should limited in their brightness. I fully agree.
The problem is that there are already laws on the books limiting headlight brightness, but they aren't enforced, and a lot of folks don't follow them. >

It's not really the brightness that's blinding, is the angle. They should be angled down towards the road. A lot of cars have adjustable lights she people and them as high as possible for maximum exposure >

To continue on this point, since op mentioned lifted trucks... alot of people lift their tru ks but dont realize that the have to readjust their lights, which is why they have what seems like an obscenely bright headlight 
Still tho i agree the brightness limit needs to be enforced thru the govmt regs at the source ( ie. The manufacturer) >

Regulating the manufacturer doesn’t do anything when people use aftermarket parts >

Aftermarket parts are still regulated
Cops should also be ticketing tho >

Yeah, shouldn't be too complicated to let cops regulate. If it's enforced enough, the parts will become harder to find.
In my province there are certain regulations over tinted windows (basically there is a certain transparency threshold, and the windshield can only be tinted in its upper part), and it works fine.
It doesn't have to be 100% of cars perfectly following regulations at all times; if you don't meet them, you'll get caught eventually. And if you stay off the roads, you can do whatever you want (re: comments about farmers putting special lights or whatever). You start requiring that new cars follow these regulations while announcing it'll become regulation for all cars by some date in a distant future, so you give plenty of time for everyone to adapt. >

As someone who frequents country roads, in roadkill country, i feel safer driving with my dim as fuck headlights than being blinded by the wankers with led driving lights either coming at me or hanging right in my side mirrors on the freeway.
I legitimately believe my high beams are dimmer than some peoples ordinary driving lights. That's just wrong.
I have no issue with LED spotties, but when your driving lights are enough to make me grab my sunglasses, you are absolutely an asshole. >

When I first started driving I lived in the country, and my parents taught me to turn off the high beams at night if someone was coming the other way. I feel like people do that less and less now and it's annoying. >

anyone that doesn't is a bad person