Generac's VT-Hybrid light towers are powered by a a battery pack with special dry batteries that can be recharged in less than five hours and provide up to eight hours of continuous operation. When the tower has used all the stored energy from the battery pack the diesel backup generator will automatically start. The light tower has four 150-watt LED floodlights. It also is equipped with a MPnano digital controller to manage all functions of the system. The unit can operator in three modes and is best used for indoor or tunnel applications.