The inventors of the blue LED won the Nobel Prize for Physics, because it was so difficult to make, and paved the way for white LED lighting and lights with tun

The inventors of the blue LED won the Nobel Prize for Physics, because it was so difficult to make, and paved the way for white LED lighting and lights with tuneable colours: http://www.extremetech.com/extreme/191580-blue-led-inventors-awarded-nobel-prize-for-enabling-white-led-lighting-revolution http://www.extremetech.com/extreme/191580-blue-led-inventors...