High Quality Content by WIKIPEDIA articles! The Tinley Park Lights is a reference to a series of five mass UFO sightings which occurred on August 21, 2004, two months later on October 31, 2004, again on October 1 of 2005, and again on October 31, 2006, in Tinley Park and Oak Park, Illinois, suburbs of Chicago. Witnesses to each event reported seeing three silent, self-luminescent objects which were red or red-orange in color and spherical in shape, hanging in the night sky and moving slowly about in ?formation? for a duration of approximately 30 minutes in each occurrence. The objects in each event were at low to intermediate altitude, and were visible from the ground for approximately 12 miles in any direction.