I was talking with somebody at work that has worked on imports for decades now and he said it had to do with 60 some year old US motor vehicle laws that only allowed for high and low beams that were switch activated. Don't know what it would take to make the change on the federal, state, and local levels to allow for these lights to be used here too. As fantastic as the projectors on my 200 are compared to the High Output GE Halogens I've got on my XJ, these new lighting systems look to be that much better than what's on the 200. Not sure if it's still the case, but I have heard that at one time it would have been illegal to upgrade older, pre sealed beam cars to to what was stock for our XJ's.........might even not allow for us to upgrade our trucks to HID, projectors, or LED's.