... years life.2. maintenance-free lead-acid battery,12V/24V 25AH~70AH, over charge and over discharge protection ... manufacturing: 1> LED outdoor lights : LED street light , LED tunnel light , LED flood lights,LED spot light,LED buried light,LED bulbs discoloration,etc ... light,etc. 3> LED indoor lights : LED bulb, LED tube,LED down light,LED spot light,LED panel,LED integrated illumination appliances,etc. ...