UFO Sighting in Limerick, Pennsylvania on 2016-01-05 17:51:00 - 4 hovering objects easily observable in the night sky

I came out of the spring valley ymca on january 5, 2016 at 5:51 pm (time was on the pics from my phone) and was walking to my car. i looked up at 4 bright lights that were hovering in the southeast of the parking lot, low in the sky. there was no sound and all were shaped the same. they were no other traffic in the sky. i am not one who dwells on the notion of ufos but this view certainly caught my attention and had me rationalizing what it was i was witnessing. i had plenty of time to pull my phone out to take a picture and then suddenly the 4 objects vanished from the night sky. total time elapsed was approximately 20-30 seconds.