I used some of those LED replacement globes in my Moke for a while, but there were a couple of things I didn't like, firstly although they were brighter than old globes, the spread of the beam wasn't as good as an incandescent globe. They were OK from right behind, but were not very good out to the sides.
Tim

Whether they are ADR compliant or not has no relevance to use in vehicles manufactured prior to the adoption of the 3rd Edition ADR's on 1 July 1988. Prior to this, there was no ADR applicable to headlights in the 2nd Edition, and ADR's are not retrospective.

As the majority of our vehicles are pre-ADR anyway, it is the Vehicle Standards that dictate what equipment they must have and how it must perform.

With respect to headlights on cars... they must be fitted in pairs, show white light to the front, light the road a particular distance ahead on low and high beam, not dazzle oncoming drivers or reflect back into your own eyes, and be a certain height and distance in from the side of the car.

If you can fit LED or HID lights and still comply with the requirements, then you are good to go.