DLT32D is solar powered obstruction light. Solar function makes it a self-contained and almost car-free light unit.The light system is composed of 3 parts: light, battery box and solar panel. When the light and solar panel connected to the battery box, the whole system can be mounted on a tower. Both vertical mounting and horizontal mounting are available. DLT32D is equipped with a 12Ah VRLA (volve regulated lead acid) rechargeable battery which could power the light up to 7 days when the weather is cloudy&rainy. The 12Ah VRLA battery is also easy to find almost anywhere.