well since you are in London, the cars in europe come standard with glass Ellipsoid projector headlights, unlike in america where we got cheap plastic crap lights (which is why you may hear about people buying the european headlights for their cars in the US). the european headlights are much better quality, they project light much better, and they look good.
the lights you bought are a cheap aftermarket light, probably made of plastic. these will not give you nearly the light that you had before, and telling from that picture they will look like crap, sorry. Theres no real way to get around it but buy a new pair of lights and sell the ones you just bought. dont buy from ebay, find a store online and get lights that are OEM or near OEM quality, that look like the ones you used to have, they make high quality replicas for half the price of the original headlights
<span style='font-family:Arial'><span style='font-size:14pt;line-height:100%'>T-Mac</span>
95' BMW 325is Jet Black, 5 speed
Xtec 6000k HID kit, DDE Enhanced, Euro Ellipsoids, M3 Front Bumper, Color-matched rear,
Alpine Mp3/CD, 20% tint, M3 Contour Rims, Smoked Corners, front lip
Clear Side markers, K&N Performance Filter, Debaffle, Color-matched side skirts</span>