I think its important to understand what's going on regarding headlight glare:
Firstly, older incandescent/halogen typically had a colour temperature around 3500K (warm/yellow) and Xenon was in the range of 4000-4500K (yellow/white). Once you get over 5000K you get into the white/blue range.
The main thing to keep in mind is that colour temperature affects how you percieve light rather than the actual intensity of it. Your brain perceives higher colour temperature as more intense, and easier to makeout details even thought the actual lumen output may be the same - however if the colour temperature increases above about 6000K you start to perceive the light as glare - even if it is focussed/pointed correctly - its just the biology of how our eyes work. We often think of modern LEDs as brighter (which they can be), but the real difference is in the colour temperature.
The first widely available commercial LED headlights were in the Audi R8, and these had a colour temperature of around 5500K - which gave it a kind of cool techno-futurist look against most other vehicles that were at around 4000k. Since that time, manufacturer's have been increasing the colour temperature to match. A new Tesla model Y is in the range of 6000-6500k (widely considered to have fairly obnoxious headlights). If you look up most of the offending models, they typically have headlight colour temperatures in that range. Anything at +6000K is going to be perceived as obnoxious regardless of how well it is pointed.
So lets say you are a regular person driving an older vehicle with reflector style halogen bulbs, and want to bump up the output. Well, you go on to amazon and look for LED headlight bulb upgrades. All of them are going to be 6000-6500K. However the main thing to know is that even though you can physically install an install an LED bulb inside a reflector housing - they don't work properly anymore. The reflector housing can't deal with the LED and it scatters the beam. It looks like the headlight has been poorly aimed, but its actually impossible to aim. Its the worst thing to do - you are using a colour temperature that is perceived as 'glare' and is shining everywhere.
My favorite part is that I looked up LED headlights for my truck (GX470) which has old reflector headlights. Hands down, the favorite brand on the forums is FAHREN LEDs sold on amazon. If you scroll down to the bottom of the Amazon page for the detailed specs, it lists uses: ATV/UTV OFF ROAD LIGHT. If your headlights weren't designed for LED bulbs, you should assume that any retrofit is illegal. I believe you are allowed to retrofit LEDs for fog lights.
