Stories tagged lighting

May
07
2012

Carbon dioxide, you light up my life. Or you could, anyway, if this weirdo has his way. Said weirdo is biochemist Pierre Calleja, who has developed a light that can run on carbon dioxide rather than electricity. His secret: green algae that produce energy when they consume CO2.

The mucklight powerhouse: Gross.
The mucklight powerhouse: Gross.Courtesy Jim Conrad

One large lamp he installed in a parking garage consumes up to one ton of CO2 per year. While that's just a drop in the air--the US alone emits almost 5.5 thousand metric tons per year--just think how much these lamps could consume if we replaced all the streetlamps, parking ramp lights, and other environmental lamps with them. It sounds like a pretty great idea when you consider that CO2 is a major driver of global-scale changes in our climate. Whoda thunk we could tackle our warming climate by turning on the lights?

(Disclaimer: I stole the title of this post from the original article. Hey, if imitation is a sincere form of flattery...) Anyway, the Italian town of Torraca (population 1,200) is the first place on Earth to be entirely illuminated with light-emitting diodes (LEDs) instead of incandescent lighting. Lots of other cities around the world are following suit.

Though they're more expensive to buy up front, LEDs are much more energy efficient than old-school light bulbs, and they last a LOT longer.

"Potential energy savings, however, appear to hold more sway with cities and building owners than cost. After all, some 22 percent of all electricity use in the U.S. is devoted to lighting, according to the U.S. Department of Energy—and switching to LEDs could save $280 billion by 2028. In fact, researchers at the Rensselaer Polytechnic Institute in Troy, N.Y., estimate that replacing incandescents with LEDs could save $1.83 trillion in energy costs globally over the next decade and eliminate the need for 280 1,000-megawatt power plants."