This movie is good, well acted, well scripted, well directed, and above all, it will keep you guessing to the end, I do not know enough about "The Technical Side" of movie making to comment, all i know is, if i see a film i like, or for that matter dislike, then i will make a comment on it, after all its only entertainment. Too many times you read about the, ins and outs of film making, and all the back stage stuff, when really all you want to know is, will i enjoy this film, and the answer to Half Light is yes, no swearing, very little sex content,just a nice put together thriller, enough twists and turns to keep the momentum going. i am trying to find something to moan about in this movie, and to be quite honest there is nothing, Demi Moore is very good in the lead role, and the mainly British cast is excellent Go see it, judge for yourself, i do not think you will be disappointed.