This is our patented, powerful double row light designed to catch the flag at rest and in bloom, Li-on battery is charged by a powerful solar panel in the day and will illuminate the flag at night with 40 High Power led's, battery is a dual cell Lithium Ion with built in smart sense technology, That means it will charge, dis-charge and maintain itself using the on board computer, This smart light will detect night sky and come on at dark, In the morning the light will detect the light and turn the unit off, truly a set it and forget it item.