You're right - I should have made it clear that his system *should probably* be legal, but cannot be declared as such without a statement from the NHTSA. Local municipalities aren't even able to certify this equipment, it would need to be done by the NHTSA themselves.
The point I was trying to get across, though, is not that a given person'* setup is or should be legal, but that the aftermarket "drop in bulb" type HID conversation kits are not legal, nationwide, under ANY circumstance. Improperly installed they can be downright dangerous to oncoming drivers. Anyone who is curious to know more can drop "nhtsa hid" into google and find a wealth of information.
That being said, I'd have a lot less reservation driving around in a car with properly aimed and tuned HID lights, as a) you're much less likely to draw attention to the legality of them if they're done right, and b) one can probably provide a pretty compelling case to a judge if the lights are professionally installed, tuned, and aimed.
I wonder if you got a note from your eye doctor stating you had TERRIBLE night vision and the lights were medically required ...