High-voltage power transmission lines are major hazards for low-flying aircraft. International Civil Aviation Organization (ICAO) and FAA regulations specifies that such structures should be warning sphere and lights.
Warning sphere in red, orange & white color are being used to mark the earth-wire for day time marking. The marking of high voltage transmission lines must be ensure by solar powered red medium intensity or combination of medium and low intensity aviation warning lights are being used to mark the towers for night time. conductor marking light for high voltage cable for night are available.
