Found this about HID lights from the Dot, don't want to spoil the party, but it's worth reading if you're, like me, thinking of fitting a HID kit.
Under the Road Traffic Act 1988 it is an offence to supply, fit or use vehicle parts which would cause a vehicle to fail to comply with the construction and use standards. A headlamp which has been approved to European Regulations for use with a HID light source is fine, provided the installation criteria are met. Once fitted to the vehicle it must have headlamp cleaning and self-levelling (which can be for the headlamp or can be in the vehicle suspension - some cars have "self-levelling suspension" and that is adequate). These items are not checked at the MoT. However, failure to comply may lead to enforcement action by the police and may invalidate your insurance. Also the dipped beam must stay on with the main beam. The headlamp must be maintained in good working order, kept clean and aligned/adjusted correctly like any other headlamp.
Fitting HID light sources adapted for fitment to headlamps originally designed for use with filament light sources is not permitted and it is not possible to obtain EC type approval for such "modified" HID light sources. Even if the vehicle does pass the MoT exam this only proves that the light produces a beam pattern which is clear enough for aiming. It does not show whether the light distribution within that pattern is sufficient to prevent glare and puts light on the correct part of the road surface.
The same requirements apply regarding fitting an HID light source to a motorcycle. Only a headlamp approved for use with HID light sources may be fitted. Unlike with passenger vehicles, there are no European Regulations on the installation of approved HID headlamps to motorcycles. This is partly because no agreement has been reached on how to implement automatic headlamp levelling and washers on motorcycles. Potentially this could allow an HID headlamp to be fitted to a motorcycle without automatic leveling or washers and we are aware of one manufacturer who has taken advantage of this and fitted an approved HID headlamp to a motorcycle. The user must still ensure, however, that the use of these lamps does not cause glare to other road users, which may be difficult to achieve if the lamps are not kept clean and if there is significant movement of the suspension during use.
DfT - Transport Technology and Standards
thats pretty interesting, I guess you make your choice and take you chances..
Ive had mine fitted now for a few hundred miles, and as yet have not been flashed by any oncoming motorist, also I live in Tonbridge and there is a huge police prescence around my area tryin to cut down on kids in there modified cars congregating in carparks and racing up the highstreet, the police are very hot on "whats legal and not" ive passed a few and havent been pulled yet, im sure if anyones going to get stopped im a likely candidate, so ill let you know if/when it happens.
my opinion is, im not dazzling on coming traffic, it has a very nice beam pattern (as close to origional as you can get) and my visibility is greatly improved around the country lanes i use every evening, so untill im told otherwise im going to continue to use them..