The “little suns” are tiny solar-powered lights, almost 2000 of which will be used to form a flower garden illuminated for 32 hours in the 66 Plaza at Roppongi Hills. Five hours' charging in sunlight gives 10 hours of soft lighting, or four of brighter light. Since the quake and tsunami of March 2011, energy has become a major, very real issue for Japan. These "little suns" are not only of use in emergencies, but can also help light up the everyday lives of people in parts of Africa without electricity. The lights used in the Little Sun Garden will be available for purchase during Roppongi Art Night, and visitors are invited to contribute to this very worthy social project.