How new luminescence could give us LED light like the sun

A team of German scientists has come up with a new luminescent material for LED bulbs. The phosphor improves energy efficiency and makes this artificial light almost as natural as the sun.  Wolfgang Schnick knows a thing or two about light quality. Not only has the German chemist researched luminescent materials since 2001 - but shopping expeditions with his wife have taught him first-hand the difference between good and bad light.