... navigation, Complient to ICAO TYPE B/FAA L-810 LT108 Solar Aviation Warning Light for Masts & Tower obstacles(Telecommunication, GSM, Radio ... replace it periodical to make sure the light can operate well, suggest to replace each one year.Please do not open ... , high chimney, lighthouse, high voltage cable tower, oil well, etc.Standard: MH-T 6012-1999; ICAO Annex 14 Solar LED Airfield Light