Solar Aviation Light: Spaceage has more than 60,000 users of solar and non-solar LED Aviation lights. Dozens of repeat customers for many years. Light as per ICAO Annex 14 specifications. UNIFORM LIGHT IN ALL DIRECTIONS unlike most manufactureres. Rugged aluminum housing having battery charge controller and light in one encllosure. Solar panel can be adjusted horizontally and vertically. Autonomy - 3 days Low battery voltage and overcharging protection. Rugged design and very easy installation.