Sorry you seem to have misunderstood me. I'm not referring to the halo's, LEDs etc, I'm referring to the fact that those US light will have the beam aimed to the right, ie. oncoming traffic, right in other drivers eyes, whereas if you were in the states you'd be driving on the right hand side of the road and the beam would then be pointing at the side of the road, where it should be.
You can buy adapters to correct the beam, however, so maybe have a wee search for them as it'll come in handy for driving if you don't want other road users blinded whilst you drive past, plus it won't pass mot.