Personally, I couldnt give a flying about "legal", I am interested in being seen and not dead, will worry about the legal implications later if I need to. I am also concerned that I dont annoy drivers with overly bright light but I suppose the chances of getting splattered by someone "blinded" are far lower than someone who hasnt seen you at all and to be honest some of the headlamps on modern cars seem to be bright enough to see through me rather than just see me, the german things with Xenon headlamps are the main culprits.
Also, we are worrying about BS numbers, brightness and placement so we dont get blamed for an accident or have one in the first place but I seem to be seeing about one in five cars at the moment with only one functioning headlamp which I would venture is far more of a worry than fitting in with the finer points of the legislation, loads of cars this morning with one lit headlamp, or one dim one bright, one headlamp and one front fog or various combinations, here we are making sure we have backups and drivers of a tonne plus of metal loose one and dont get it fixed, see the same sheddy Blue Laguna every morning, old bloke with a fag in his mouth, one working lamp so when that fails I will just have to look for the red tip of his Fag, no redundancy and when the other one ineviatably goes no lights, funny how he always manages to be smoking so he must stop for fags but cant summonm the wherewithall to stop at a car spares shop and spend a fiver on a bulb, and that is what we have to deal with so if I glare this daft old twat I am not going to loose sleep over it.