Profile: Hydrosphere UK Ltd. is a manufacturer of hydrosphere, oceanographic and meteorological instruments. Our LED Dialight medium intensity white strobe and red beacon is designed for the lighting of radio towers, wind generators and other obstructions to aerial navigation, as specified by the FAA and FCC. Our Dialight L-810 red steady burn obstruction light was the first LED device to be certified by ETL to the rigorous FAA standards. It is available in a range of voltages from 12 volts to 230 volts, and in single or dual configurations.