Originally posted by Darth Truculent
A UV round can kill any Vampire. Silver Nitrate can kill any Lycan/Werewolf (save the scene where Lucien actually survived taking only a single bullet - then Kraven finishes him off).
Twilight vampires aren't adversely affected by the sun.
There's was no mention of the wolf-boys in Twilight being vulnerable to silver, from what I hear/read.
Lucien took several bullets, as you see several of them bleed out of him when he does that flex/squeeze maneuver, this is in the apartment scene.