Cheveron shaped ojects in V shape formation; daytime sighting, silent moving

We were seated on our side porch as we noticed a set of 9 objects of Chevron/boomerang shape in a "V" formation was moving from the east to the west, approximately 60 degrees across the northern part of the sky. 
There were white lights on the bottom each of the objects. Their coloration was silver and they moved silently across the sky. It was hard to determine height, but one could say about 20,000 feet. 
The weather was clear blue skys and temperatures in the low 70s. Though this area is a valid flight path for airplanes going into Kennedy, La Guardia, Farmingdale and Islip airports; this sighting was certainly not airplanes, baloons or objects of that nature.
Date may be approximate, although the witness does not indicate that fact.  PD