Solar Universe India Plastic Weatherproof Light, Inbuilt Battery & Solar Panel  (Black, 1-watt) DQ073C is a solar powered festival string / laddi light. The solar panel system comes with an inbuilt battery and an anchor to grout it into mud. The string of LEDs can be spread across 10-15 feet of open outdoor space and may be used for beautification of your flower pots or trees. Once switched on, the light functions automatically wherein it lights up when the sun goes down and switches off when the sun starts shining again. This is a great replacement for the conventional laddi lights used on popular festivals such as Diwali.