Jun 11, 2015 - 02:05 PM
Because of the limited beam width of these lights, one light box, called a flash head, has to be mounted on each leg of the tower at each light elevation. This means that if you have a 900' tower the FAA may dictate that you have a tier of lights at 300', 600' and at the top, 900'. This equates to 9 total flash head units, 1 per leg at each of the three levels. If you are looking at a tall tower in Google Earth and can count the levels of light boxes, or flash heads, you see, then you can tell fairly accurately, how tall the tower is.