Photonic Structure Increases Light Bulb Efficiency

An Anonymous Coward writes "A new experimental microscopic tungsten lattice can increase the efficiency of an incandescent electric bulb from 5 percent to greater than 60 percent. This is done by converting waste heat into visible light. "

Comments

Question

[friday2k]

According to the article "The work was performed with a photonic crystal operating in the mid-infrared range". Though the author states further that there are no known obstacles to downgrade into the visible light range, why did they start in the Infrared spectrum to begin with?

Efficiancy?

[SomethingOrOther]

can increase the efficiency of an incandescent electric bulb from 5 percent to greater than 60 percent. This is done by converting waste heat into visible light. "

Well
No shit!
How else do you improve the efficiancy of something!