I was sitting on my deck on tuesday, 4/28/20 at approximately 830-930 pm, looking west toward the delaware river when i observed a string of silent oval lights flying south in a straight line (once in awhile you could observe a cluster of 2 or 3 objects flying together, but primarily, it was approximately 50-70 objects flying in a perfect straight line). i called for my husband to observe and he witnessed them too. the whole event lasted approximately 2 minutes from beginning to end. we called 3 local police departments in ewing, nj, yardley, pa, and lower makefield twp., pa, and no one else reported any such sighting. we called verge aero (a drone company based on philly that does light events). they had an event that night, but the drones were assembled in philly and he explained that we wouldn't even be able too see drones from the distance we were describing for 2 reasons: 1) drone lights aren't that big; and 2) drones are not allowed to fly above 400 feet. additionally, we live in extremely close proximity to the trenton-mercer airport, nj state police headquarters, and a military installation. we are therefore well versed in what different lights in the sky look like. these were not helicopters, airplanes, drones, private planes, etc. they were silent, lighted oval objects that were flying in a perfectly straight line numbering 50+. it was a highly unusual experience.