i had retro fit hids on my old mazda mx6, the beam pattern was perfect and well defined, but the hid was fitted to a projector lense, i have seen hids in a std headlight with no definable pattern, and some the had good patterns.
as far as i can work out, to have hids, the headlight will need to be self leveling and/or a self cleaning mechanism.. but even my MOT tester cant get a concrete answer from vosa, at the moment, if the beam pattern is ok, its down to the testers discretion..
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