OLEDs

Organic Light Emitting Diodes are conducting plastics. Material scientists have studied alternatives to metals to conduct electricity. It is cheaper to manufacture plastics and last a long time. One problem with OLEDs is that they get wet and deteriorate. This does not sound like a terrible difficult problem to solve. But then again, when I was twenty years old, fusion reactors seemed within reach. More than thirty years and billions of dollars later, I am still waiting for those reactors. I hope that Edison's light bulb will be given an honorable discharge soon. OLEDs or other solid state light solutions should take over after more than a hundred years of the incandescent light bulb.