All the nuclear power plants in Japan have stopped operation, but before the March 2011 tsunami 30% of the total electricity generation had been supplied by nuclear power plants. It is predicts that by 2020, penetration of the LED lighting in Japan will be more than 70%, by which we can reduce 7% of the electricity. In this presentation, current and future energy savings by GaN and related compounds will be discussed.

© 2015 Optical Society of America

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