I understand about coatings are filters for quantity of light. But that does not mean all 5000k headlights have less light than 3500. Reducing light output with the compromise of color is silly. But I wonder why 3200-3500k is best for automotive lighting assuming all else equal. The only benefit I know of is fog where even lower color temps are ideal.
OEM Xenon headlights are in the 4000-5000k range and LED headlamps are 5000-6000k. While one of the "benefits" may be marketing it as different is better, there are a lot of engineers that design them to perform better. Owners of vehicles in general prefer both types over incandescent. I understand OEM designs are not the same as aftermarket conversions.