Ufo chased by military over Warminster Pa

My roommate and I heard a low flying plane. It was very loud and echoing off the buildings in our complex, As we looked to the sky to observe, a few seconds later appeared a dark shape with 3 green lights. It came into view from the west and went out of view to the East. Flying very fast behind it was what appeared to be military planes. For over an hour after this first sight we counted 18 military planes coming through in the same direction, only much higher in the sky as time went on. The objects shape is unclear. It looked like a boomerang type shape with three solid green lights. The object was very clearly larger and longer than the plane that followed behind it. And it was very silent with no noise that we could hear. The military plane however was very loud. It was flying very low and clearly being chased. 10 minutes after the sighting our power flickered multiple times before going out completely due to “undetermined causes”. It was not restored til! l 03:03 am. Whether the power going out was simply coincidence or not, is undetermined.