Summary : Approx. 10-15 clusters of boomerang shaped lightsEach boomerang cluster had about 8-10 lights, and all ten or so units moved in unisom across the night sky. There speed was about the same as one of our aircrafts. We used binoculars. but could not tell if each unit of V-shaped lights were connected or separate. Since the whole array covered a huge area of sky, we think each v- shaped unit was independent. We observed this strange sight for approx. 30 minutes