Fast group of lights.

I like to watch the sky; star gaze.  This morning I saw a group of lights, about 50-60, flying in formation at about 5:50.  They were a dull white color, not real bright. At first I thought it was a flock of birds, but I'm sure it wasn't. First, they moved much too fast for birds. They maintained perfect alignment, although there was some irregularity in their spacing from each other.  I only saw them for about 5 seconds or less. It was too early for flocks of birds to be flying, as it was still dark and just starting to lighten. I've seen hundreds of meteors, these were too dull and slow to be those. And, they were all the same size and shape. There was no noise, and no indication of flapping, or any slight change in distance from one another, as you see with birds. They could've all been attached to one object, but I got the impression they were separate, but moving together in unison. It was a little bit similar to photos I've seen of the Lubbock lights, ! but not in such a perfect grid shape; more irregular spacing.  Whatever it was, it was unusual and special.