You need to go and comprehend what I wrote. The US has no glare stipulation on the books as far as I can find. I found studies about it, but no laws. Glare from a 100% stock housing that is 100% legal and dot approved can be manipulated by aiming. If there's excess weight in the rear, the beam will be directed up, causing a glare, even with stock bulbs and housings. I can show you my beam pattern with hids against a wall, the pattern was damn near perfect, a nice even cutoff, with some light being directed up above the cutoff (just as you would with halogen bulbs). Technically, the term glare would refer to any light that strays above the cutoff. That's why projectors are becoming more common place, they have such a sharp cutoff with no light bleed above the cutoff line. The problem with that, you can't see anything above the cutoff line, and there are plenty of times where that can be a problem. Are some headlight housings better than others in regards to beam pattern? Absolutely. The ram quad housings, are not that terrible. They are outfitted with long life bulbs that sacrifice output for longevity, as do a lot of manufactures. I absolutely stand by my point that a brighter bulb, requires more attention be paid to its aiming. Again, glare is the light the bleeds off above the cutoff. So, if stock bulbs produce 400 lux of light at 25 feet, they might produce 40 lux of light at the same distance, but 6" above the bright spot. Now, an upgraded halogen, like silverstars might produce a max of 500 lux at the bright spot, but maybe 50 lux at the same 6" above the bright spot. Now, if you lowered the aim an inch, or half inch even, maybe that goes from 50 to 40 or even lower. These are all hypothetical numbers, but it shouldn't be hard to understand the concept and the point, that like I said, a brighter bulb requires more careful aiming than a dimmer bulb.
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This is a set of 55w hids aimed at a wall where I work, approximately 25-30 feet away. It's slightly uphill, so the location of the cutoff can be disregarded. However, I adjusted the exposure to show the pattern and to try to mimic what I actually saw on the wall, which is a bit darker than it should be. That said, there is a clear, definitive cutoff line and it angles DOWN on each side. If you go 6" above the bright spot, there's minimal light there, minimal glare. Yes, if I aimed these higher, people would be pissed. It took some trial an error to get them where I was happy with the throw/distance, but minimized the amount of glare that hit other drivers. Once they were aimed, I was never flashed. I have pictures from my 2016 that had leds in the lows and the pattern looked identical. In the case of our rams, with quad reflector housings, as long as you don't have trash leds, you can achieve a pretty good beam pattern, increase your ability to see and not **** off other drivers with excess glare.