A beacon device to be installed on a tower, the device including: an electric energy generating unit comprising: at least one photovoltaic module able to be wound over at least part of the circumference of the tower, and a light energy generating unit configured to be fastened on the tower the light energy generating unit comprising: a housing having a periphery, a storage member storing the electric energy generated by the electric energy generating unit, a regulating member regulating the charge of the storage member, and a light-emitting member supplied by the storage member, the light-emitting member extending over the periphery of the housing.