Are we talking reflector or projector headlights? I seem to remember from @Bob T ‘s writings on the subject, that projector lights have their own built-in cut off.
Thanks all for the responses. I drilled out the back of one housing and the bulb fits a treat with all cables inside and the fan part just sticking out enough without causing any problems. Looked good against the garage wall last night but will give a good test tonight when its dark. Cheers
Happy to report they are superb and the spread and cut off is great. Put one in the high beam too (will change both back for MOT due in May). Bargain at £18.86 delivered compared to the £30 from Halfords for inferior bulbs. Cheers