Yeah I think I mucked up the track or something inside. I opened it up this morning and couldn't see anything obvious. As far as I know they are led, bought them from ebay. Confusing as there are inverters. http://www.ebay.co.uk/itm/302222051408They are not Z3 specific ones are they? It looks like the inner ring has been bent slightly when its been pushed in, which could have broke the CCFL tube. They are very fragile and break easy, I know from experience
I have 2 new CCFL spares for the inner rings which are made for Z3 headlight's if you want them? They may not be as bright I can't remember what they are like and I don't think I have any inverters to test them, but if you want them give me a shout. Or try some LED ones, they need cutting down but are very bright and will last a lot longer than the CCFL ones.
I installed them this morning. I have to say that I much prefer the stock headlights with black rings to the aftermarket ones.
I also installed the Simota filter properly, after receiving the ducting from @5harp3y
It sounds mega on full throttle!