As specifi ed by Annex 14 of ICAO regulations, Low Intensity Obstruction Light can be used to warn the presence of obstacles up to 45m height, such as telecommunication towers, wind turbines, chimneys, cranes, buildings and other structures. This beacon is the simplest device according to ICAO standards. It provides steady burning red light with two types of intensity: ≥10cd for Type A, ≥32cd for Type B and ≥32cd for Type E (fl ashing red light).