Just an update on my LED H4 headlight bulbs.
https://www.classiccarleds.co.uk/collections/12-volt-collection/products/latest-led-headlights-h4-philips-z-es-hi-lo-beam-conversion-9-32v?variant=25760255303I have had a couple of occasion to drive my wifes Jazz GE at night with these new LED bulbs and I must say they make driving in the dark a lot more pleasant, and I had already fitted Phillips X-Treme brite Xenon filament bulbs to her car soon after she got it to upgrade the lights, but the LED's are way brighter and they seem to put a better spread of light on the road, plenty of light along nearside verge for traffic signs etc. and a sharp vertical cut-off and lower level light across to offside verge. Looking at amount of light on the road I thought I may be dazzling oncoming drivers, but I parked the car on a quiet road with dipped beam on and walked down the road a bit and no dazzle, also no-one has flashed me so far, so that says something. Will try to take my camera next time I go out in dark and get some shots of the actual light on the road to post here, but may be a day or two.
You can get other bulbs cheaper (and more expensive by the way check this site
http://www.horizonleds.co.uk/5th-gen-4000-lumens/h4-5th-gen-4000-lumens ) but the vast majority of them have illegal beam pattern. The bulbs I got have the Phillips Luxeon chip pack designed to exactly mimic the position, length and width of the filaments in a standard bulb, and having looked at Phillips bulbs they look identical in every detail, even down to shape of heatsink, but cheaper.
The only thing I had to check on the bulbs when i got them is if the body of bulb was rotated to position 8 on the dial (starting position for RHD vehicle) and locked down (allen keys supplied with bulbs) and they already were as delivered, I changed nothing else on vehicle headlight alignment.