That site has Golden Dawn's Knebworth Masters – 30th Anniversary Edition, not Lighthouse's; in addition a part is corrupted, so I don't suggest to download it from there. Anyway, Golden Dawn's is considered the best video bootleg of that night; it features Winston excellent matrix as audio source, but a purist could prefer the unadultereted video feedback.
Regarding the second night I'm not totally sure about which version is the best by a video standpoint, but I think the consensus goes with Genuine Masters' Return of the Dinosaurs.