OLS10 series is solar powered obstruction light. Due to solar module's limitation like solar panel size and battery size, the light is being designed to work under flashing mode instead of stead-burning mode which is required in major regulations. But advantages like enegy saving and cable saving make the solar powered light a good option on obstruction marking.
OLS10 series double lightDouble light is also available. If works with control box, it will auto-switch the "stand-by" light on when the "working" light fails, which makes sure that there is always a light working atop of the tower.
Specificationshttp://www.reddotsignal.com/en/products/aviation/Solar/OLS10/