Observed 2 bright lights no sound

I was alone in the control tower at Bridgeport Connecticut the Igor I Sikorsky Memorial Airport.  It was around 22:00.  I observed two large white lights that appeared to look like landing lights to a large aircraft on final approach to runway 29.  There were no other lights I could observe with the tower binoculars, I had no inbound aircraft. 
It looked like the lights were 8 to 10 miles out, I called New York approach control and asked the controllers if they has any inbound aircraft to Bridgeport, they advised negative, do you have any traffic on radar southeast on final for runway 29, and they advised negative.  
I broadcasted in the blind on Tower and emergency frequency, "Aircraft on final to Bridgeport Runway 29 Identify yourself."  No response.  "Aircraft on final runway 29 at Bridgeport flash your landing lights."  Still no response.  
As the lights got over the beach area I stepped out onto the tower catwalk with binoculars in hand.  The 2 lights separated, 1 turned (right) northeast the other turned (left) southwest, no navigation lights observed and no sound.
Air Traffic Controller rept. PD