DON'T EVER FIT A HID KIT TO REFLECTOR HEADLAMPS
HID kits were designed to be installed where there is a projector lens inside the headlight, giving it the correct clean cut off beam pattern so that you're not blinding on coming cars.
If you fit a HID to halogen reflectors you will be blinding oncoming cars badly. Ever seen a car coming towards you or in your rear view mirror with extremely bright headlights in a pure white or usually bluish tint light shining out all over the place like as if the car has it's main beams on? that's how it looks when you fit a HID to reflectors.
They also changed the MOT rules last year where now if you fit a HID kit to any halogen headlamp, reflector or projector, it will fail the MOT.
If you want xenon headlamps, purchase and fit a set of genuine factory xenon headlights, they will pass an MOT fine and will not require headlamp washers or self levelling.