Excuse the extreme newbie-ness of this question - but my Altezza has a genuine (read: not blue-filtered) Xenon HID headlamp kit installed, and one of the headlamps isn't working (stopped the other night). I'm presuming it's the bulb that's gone but am wondering if the bulbs are as widely stocked as regular headlamp bulbs?
Where will the best place be to get a replacement? And is there any difference between bulbs (other than power/light rating) that I should be aware of? Should I replace both bulbs at the same time?