They get Julia (Laura Regan) in the end.
Thanks, miss nikki dikki doo! (no, really. that's the name.)
monkeyman1138 writes in that "In the UK ending Julia (Laura Regan) is released from the mental hospital and returns to her home,which is now filled with lamps and miscellaneous lights to protect her from the creatures." So there you go. A completely opposite ending!
And in yet another spin, Eric writes in that "In the alternate ending found on the DVD, you find out that Julia's whole experience was a dream and that she's really been locked up in a Mental Institution since she was 16. As and added twist you also find out that the people who where marked and attacked by the creatures are also paticents of the hospital."