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Festival fireflies in Japan
Thousands LED balls descended into the river Sumida that flows through Tokyo, Japan. Balls were charged by solar energy during the day and at night they did not need any additional charge.
Descent balls was confined to traditional festival Hotaru. At the end of the festival all the balls were caught with special nets.
Descent balls was confined to traditional festival Hotaru. At the end of the festival all the balls were caught with special nets.