We live in an area of Greene Co. TN facing Viking Mountain. On several occasions now we have seen a very bright light over the mountain at night. At first we thought it was a vehicles headlights on the mountain however due to the rapid movement we have decided it would not be possible for a vehicle to travel that rapidly on the winding mountain roads. The light is very bright and a very large round shape. It very quickly shoots up, down, left, and right with no set direction. The movement is very rapid and raises above the mountain top and below the treeline. From our location we cannot get a clear picture or a clean sight with binoculars, it just appears to be a very bright light. Typically when we see the light it lasts for a couple hours. Also, when we see the light we typically Zee one to three aircraft flying in the area around the light. It is clear these are typical aircraft with standard flashing lights and not part of the mountain light however the comparison is size and brightness is astonishing. We have read reports of similar lights in the same area spanning over the past 7 years. Very odd, and very unnatural.