Driving on Pond Rd.Returning from my sister's house I saw a light that appeared to be to the street (I actually thought it was part of the streetlight,until it moved that is).The light the size of of my thumbnail @ armslength.The light then moved down to the right behind the trees & it semed to 100ft off the ground & was approx. 150-200yards into the woods gliding in between the trees.At first I thought it might be a plane landing @ Mac Arthur Airport, but the airport is 6-7mi. east of where I was.Also thought it might be a search light from the airport, but I'ld seen the search light before & it has a sweeping motion.This light had a steady pulse & moved a a relative straight line & did not change it's elevation in anyway apart from the first time it moved away from the streetlight.I had the windows rolled down & there was no sound.It then reversed it's course.