that made this concept work. the film has a fresh take in this horror/thriller world, as these aliens have a full plan. they have a reason for what they doing, they come to earth with a full on attack plan, and our heroes of the story are just normal people who survive the first wave of the attacks.
the aliens are probably the coolest things ever, as they toy with the idea that you have to fear the light, darkness becomes a safe haven. but, then they decide close to the end to show us these aliens that you can't see. that was a major flop!!!
having them hidden from us, was 