ORIGINALLY DESIGNED AN AERO BEACONS, AND STILL FREQUENTLY SEEN IN USE AT AIRPORTS, THIS IS ONE OF THE MANY BEACONS THAT FOUND USE IN LIGHTHOUSES.
WITH LENSES AT EACH END AND A 1000 WATT BULB IN THE CENTRE, THE LIGHT WOULD SHOW 2 FLASHES EVERY TIME THAT IT ROTATED. DIFFERENT GEARS WERE USED TO ACHIEVE DIFFERENT ROTATIONAL SPEEDS, THUS A CHARACTERISTIC NUMBER OF FLASHES PER MINUTE WAS PRODUCED.
EACH LIGHT STATION CAN BE IDENTIFIED BY THE FLASH SEQUENCE THAT IT DISPLAYS.