An obstruction lighting system for an elevated structure, comprising: two obstruction light beacons (102, 104) that provide at least 1,500 candelas (cd) of light output, wherein each one of the two obstruction light beacons (102, 104) comprises three or more optics (204, 1306), and for each one of the three or more optics (204, 1306) a respective plurality of light emitting diodes (LEDs) (204, 1302), wherein the respective pluralities of LEDs (204, 1302) that provide at least a 180 degree light output in a horizontal direction are positioned on one side of each of the two light obstruction beacons (102, 104), wherein the two obstruction light beacons (102, 104) are operated together to provide a combined 360 degree light output in a horizontal direction; and a single power supply for providing power to the two obstruction light beacons (102, 104) using a single set of wires that connects the two obstruction light beacons (102, 104); characterised in that the three or more optics (204, 1306) of each one of the two obstruction light beacons (102, 104) collimate light in a vertical axis to create a beam spread in the vertical axis of between 3 and 6 degrees, wherein a light intensity at 0 degrees vertical and +/- 90 degrees horizontal is between 30% and 70% of the light intensity at 0 degrees vertical and 0 degrees horizontal for each one of the two obstruction light beacons (102, 104), wherein the light intensity at 0 degrees vertical and 180 degrees horizontal is less than 10% of the light intensity at 0 degree vertically and 0 degrees horizontally for each one of the two obstruction light beacons (102, 104); and further characterised in that the obstruction lighting system further comprises: a monitor for detecting a failure of an LED of the plurality ofLEDs (204, 1302) of each one of the two obstruction light beacons (102, 104). two obstruction light beacons (102, 104) that provide at least 1,500 candelas (cd) of light output, wherein each one of the two obstruction light beacons (102, 104) comprises three or more optics (204, 1306), and for each one of the three or more optics (204, 1306) a respective plurality of light emitting diodes (LEDs) (204, 1302), wherein the respective pluralities of LEDs (204, 1302) that provide at least a 180 degree light output in a horizontal direction are positioned on one side of each of the two light obstruction beacons (102, 104), wherein the two obstruction light beacons (102, 104) are operated together to provide a combined 360 degree light output in a horizontal direction; and a single power supply for providing power to the two obstruction light beacons (102, 104) using a single set of wires that connects the two obstruction light beacons (102, 104); characterised in that the three or more optics (204, 1306) of each one of the two obstruction light beacons (102, 104) collimate light in a vertical axis to create a beam spread in the vertical axis of between 3 and 6 degrees, wherein a light intensity at 0 degrees vertical and +/- 90 degrees horizontal is between 30% and 70% of the light intensity at 0 degrees vertical and 0 degrees horizontal for each one of the two obstruction light beacons (102, 104), wherein the light intensity at 0 degrees vertical and 180 degrees horizontal is less than 10% of the light intensity at 0 degree vertically and 0 degrees horizontally for each one of the two obstruction light beacons (102, 104); and further characterised in that the obstruction lighting system further comprises: a monitor for detecting a failure of an LED of the plurality ofLEDs (204, 1302) of each one of the two obstruction light beacons (102, 104). a monitor for detecting a failure of an LED of the plurality ofLEDs (204, 1302) of each one of the two obstruction light beacons (102, 104).