ok, i love light and i hate stock skyline lights, their just shit.
i did replace the old bulbs with the brightest i could get which were the phillips 4000k halogens. their still shit, slightly less yellow but the light is atrocious.
i don't have the projectors as i have N1 lights which are rear reflector so i wasn't a fan of xennons,
Xennons have a bad habit of throwing light poorly in reflectors as the light source is coming from a few mm or cm further away due to the longer light tube.
however i found a new type of LED H4 bulbs which i purchased.
these actually center the low beam the same as stock lights and the high beam properly for a longer throw of light. also yes they do high and low beam in one unit.
as you can see, properly placed light source in comparison to the stock bulb.
low beam closer to the base and highbeam further away.
and their bright. slightly brighter or very similar to a good 6000k Xennon but no warm up, no heat and flicking high /low is instant. this is the comparison as best as my phone could capture, it is adjusting slightly more for the brighter white but you can see in the 3rd shot which has both beams on, it drowns it out. remember this is the best philips white bulb i could get. old new both on road this is comparison between the fog lights and normal beams