100,000 solar-powered LED lights were released into Tokyo’s Sumida River to celebrate the beginning of the Tokyo Hotaru festival. The thousands of glowing lights were a nod to the past and the literal meaning of Hotaru, which is “firefly”. Before pollution took over the river, millions of fireflies would gather around the shore to create beautiful light displays. The light installation was a breathtaking protest against what the river has become because of human abuse. Each tiny light was designed by Panasonic to begin shining as soon as it hit the water. They floated their beautiful course and were caught in a large net at the end to prevent further pollution of the river.