New Surplus Whelen Flashing Anti-Collision Light Assembly p/n 01-0790044-09. We found these in an inventory we purchased. This light is a self-contained, 150 watt, quartz halogen flashing Anti-Collision light. We believe that these were factory installed on Lear 31, Falcon 900 and Cessna Citation X. It is also a direct replacement for oscillating beacons on most corporate aircraft.