Saw 7 light formation hovering over neighbor in West Allentown, PA on Sept 13th 2014 at 10:34 PM

I was driving in West Allentown, PA not far from my home on Saturday, September 13th.  As my girlfriend and I were driving she pointed to a huge set of white lights that were almost hovering or moving slowly (I was driving so maybe because I was also moving) over a neighborhood.
There were seven lights, maybe nine, in an arrowhead type triangle formation, basically no flat third side of the triangle shape, as it went inward.  I drew an interpretation of what I saw and can show you the drawing of light setups.  Anyway, they were all bright white lights, and as we tried to find a place to pull over, the lights dimmed to about 25% of what they were.  It blinked red once or twice before I stopped getting a clear view from trees and houses.  
After about 15-30 seconds we pulled over and it was completely gone. I looked towards the local airport direction and saw nothing in the sky and I could see the stars, moon, and very clear sky.  It was weird not seeing anything in the sky only a minute after that, which makes me know it was not an airplane or helicopter.  Also this formation of lights or underneath of something, was about 400 feet above us if I had to guess.  Maybe even less.
The time was 10:35 PM in Macungie/Wescosville area outside of Allentown, PA.  Time stamp of 10:36 PM calling my friend, so well say we saw it at 10:34-10:35 PM   
Below is a picture of what I thought the light formation looked like.  This is the best characterized way I can describe the formation.
 O O o O O  o  O  
The two little circles are smaller to represent that they were higher up, not making a full triangle, but more like an arrowhead shape.