Abstract: A system of modifying existing light systems and for the installation of new lighting systems on school buses and similar vehicles so as simply to convert a conventional "four-light system," to a government-recommended "eight-light system," consisting of a red flashing hazard warning system including four red lights and four amber lights. The invention has particular utility in applications in which the installation of additional wiring is either inconvenient or impractical, since conversion may be effected with a minimum of disruption of existing "single wire" systems.

Abstract: A system for controlling navigation lights and flashing anti-collision lights in the wing tips of an airplane, including a switch and circuitry constituting means for turning the anti-collision lights on and off from the cockpit of the plane without interfering with the normal operation of the navigation lights. The system functions using only a single wire to each wing tip, thereby obviating the need to install additional wiring inside the aircraft wings and fuselage.