Whoa

 Illustration of Haitz's law. Light output per LED as a function

of time, note the logarithmic scale on the vertical axis.



 "And in one possible indication of the acceleration of green growth, high-efficiency LED (Light-Emitting Diode) ceiling lamps in the Japanese household market went from 2.2 percent of sales in February 2011 to 57.7 percent this May."

A Crossroads for Japan: Rivive Nuclear or Go  Green?