The Waka Waka is the most efficient solar lamp in the world. The whole planet. Thats pretty special. Equipped with a ludicrously capable solar cell, just leave the Waka Waka out in the sunlight to soak up the rays & when night falls it will provide you with a retina-popping 40 hours of light. Its the perfect lamp for a long (incredibly long) midnight read & therell be no more scrabbling around a pitch black tent looking for that damned toothbrush.