A neighbor down the street bought a pair of LED headlights and finagled me into installing them. He is, BTW, a survivor of at least two strokes, is mobility impaired and almost completely incomprehensible speaker as a result. Hadn't oughta be on the road, much less at night. Spooky to ride with. He paid well over $100 (forget the exact amount) for the pair and of course came from China.
Nevertheless I took 2 hours to put them into his 420SEL. One went in after half an hour of finger-bending, the other was much more difficult. A little silicone dielectric helped, but on that car it was simply a difficult, tight fit. We didn't have the time or option of removing the entire headlight bucket, or the reflector. What a b*tch job. They seemed brighter than his halogens, but it was a bright hot sunny day. I haven't asked him since how they are holding up.