Originally Posted by jaygsi

Cheers i did, unfortunately alot of those brands aren't in the UK.

The GTR Ultra 2 bulbs aren't in the UK and are well over £200 too import.

But they look good.

Originally Posted by stockcar

your after a Gen II kit.......

Originally Posted by Vxr2010

The Osram night breakers or the phillips equivalent , don’t get cheap bulbs on ebay , i did and wasted a load of money trying different brands , i put the osram ones in in the end and they were a lot better than the standard hid bulbs , if yours is not hid i would still recommend the same brands but there uprated versions ie the night breaker ,plus get your lights adjusted adds a lot more throw of light , night time driving is now way better 👍

Originally Posted by lockheed

Im glad you had a good experience with the osram night breakers, i tried them in my 5 series touring and they were absolute garbage.
I suppose they could work differently for other cars,.
My forester is far better its literally like night and day

Originally Posted by ALi-B

As mentioned. H4 and H2 bulbs require precise location of the bulb filament (the actual source of light) in the headlamp in order for the reflector to focus the light and create the correct beam pattern. Any lamp that uses a parabolic reflector (all car headlamps) has to have the bulb/light source fixed and aligned in a specific manner to project a proper focused beam.

This is especially true for 'crystal' headlamps that use complex surface reflectors to create the beam pattern.

Think of a overhead projector at school/college and how you focus it to get clear text. It's the same principals with headlamp reflectors. Apart from you can't adjust it (apart from jiggling the bulb about in the holder or bending/grinding the location tabs).

Even cheap and nasty halogen bulbs can throw off the beam focus and cause excessive scatter meaning light isn't being focused to where you want it and just scattered upwards and outwards rather than down and front (and dazzling oncoming traffic in the process). Same for HID retrofits, which is why most fail MOTs.

Generally the type of headlamp will dictate how good bulbs with bad filament alignment will work:

Fresnel lenses (traditional old style headlamp with a H4 bulb): Beam pattern present, but lots of scatter.

Complex surface headlamps (crystal/clear lens, usually a H7 bulb): No beam pattern at all or incorrect beam pattern. Light scattered everywhere or just one big blob in the middle (also common with badly fitted bulbs).

Projector headlamps (use a variety of bulb types, typically HB3/9005 or D2S. Beam pattern present, but dull beam and poor overall brightness (as the rear reflector can't focus the beam towards the prism lens at the front).
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The latter (projectors) are the most tolerant type of headlamp for aftermarket bulbs, the worst case is poor brightness.

Edit: Beware of fake Osrams and Phillips bulbs on online shops and on ebay/amazon etc. They are in very very good counterfeit packaging, and sometimes sold at the same retail price as genuine!