Collective suggestibility? You were all listening in to the excited comments.
Were you perhaps looking too intensely at celestial objects in the dark, thus making them appear to move about?
I am not seeking to dismiss what you saw; I offer some explanations which are worth consideration. Most unusual sightings can be explained as mundane phenomena...which is not necessarily proof of mundanity!
Do the lights maintain any kind of formation? If so, do they do so whilst changing position? Do they change colour?