Do not take the word of JW Speakers. They are in the business of selling things, not the legal arguments. I've seen similar on other related issues where the 'advice' given is definitely wrong.
In any event, it could be argued that compliance on the light performance was irrelevant as the other needed bits, levellers and washers are not part of the light. So yes, possibly a legal light, but not a legal installation. So the problem still exists.
My understanding is the levellers and wipers are a requirement as a result of the possibility of a misplaced beam causing dazzle over what an incandescent bulb would give.
I admit to playing the game on LEDs on other lamps, but the situation on a 1930 car is a bit different, and the only lights that are not legal on my car, could be removed to make the car legal again. As these are the brake lights, it would be a very foolish jobsworth who pushed the issue (pre 34 cars don't have to have brake lights and mine didn't from new).
