When LIFE magazine’s Gjon Mili, a technical prodigy and lighting innovator, visited Pablo Picasso in the South of France in 1949, it was clear that the meeting of these two artists and craftsmen was bound to result in something extraordinary. Mili showed Picasso some of his photographs of ice skaters with tiny lights affixed to their skates, jumping in the dark — and the Spanish genius’s lively, ever-stirring mind began to race. According to LIFE, Picasso gave Mili 15 minutes to try one…