They seem to have reasonable ratings, youtube etc, but, " Please note: These products are not ECE-approved and must not be used on public roads in any exterior application. Use on public roads will invalidate both the operating license and insurance coverage. Some countries prohibit the sale and use of these products. Please contact your local distributor for information on your country. "
So you use at your own discretion but technically should not pass a MOT, however I don't know of one that actually takes bulbs out to check
I have not used these or any other LED in zeds headlights yet but having put a bright hid kit in recently, and being less than impressed by the improvement.... I must say that I do not think a bright bulbs will help make our lights noticeably better!