Answer
Efficiency is the defining characteristic of Hiroshi Amano's invention. His groundbreaking work led to the development of highly efficient blue light-emitting diodes (LEDs), which revolutionized lighting technology. These LEDs consume significantly less energy than traditional incandescent bulbs while emitting brighter and more durable light. Amano's invention has had a profound impact on various industries, including electronics, automotive, and lighting, making him a pioneer in the field of energy-efficient lighting.