To provide an excellently long life airplane warning light without shortening the life due to overcharge of a battery etc. while securing required power generation quantity and without damaging and shortening the life of a wind mill at the time of strong wind.

This airplane warning light 10 having a photovoltaic power generation device 21 provided with a solar battery panel 22 converting energy of sunlight into electric power, a wind turbine generator 31 provided with the wind mill 32 generating electric power by wind power and the battery 13 storing the electric power generated by these two power generators 21, 31, turns on at least one lighting 12 by the electric power from the battery 13. Charge controllers 41 are provided between a photovoltaic power generation device 21 and the battery 13 and between the wind turbine generator 31 and the battery 13. A braking device 51 of the wind mill 32 is controlled by a wind mill controller 61 according to a detected signal from an anemometer 63 measuring wind power around the wind mill 32, a rotation system 64 detecting conditions of the wind turbine generator 31 and a pulse generator 65. By controlling charge by the charge controller 41, an overcharge is prevented so as to prolong the life of the battery 13, and the brake control of the wind mill 32 is performed by the wind mill controller 61 and it is stopped at the time of a strong wind to prevent damage and to attain its long life.