But uncertainty around the results of a 1958 conclave had led to the introduction of chemicals to make the color of the smoke more obvious.

CNN: March 13, 2013 -- Updated 0018 GMT (0818 HKT)

The last century has seen only a few major display innovations, among them the move from black-and-white monitors to color and the introduction of flat, liquid crystal displays to replace cathode ray tubes.

FORBES: Seeing the Light

For an eye-popping introduction to the future of lighting, walk into the lobby of Philips Color Kinetics' headquarters outside Boston.

FORBES: Magazine Article