Scientists Make LED Bulbs From Salmon DNA

BY Ariel Schwartz

Where can science fiction possibly go when real-life headlines proclaim that researchers have created LED lightbulbs from salmon DNA? University of Connecticut researchers have added fluorescent dye to salmon DNA and spun the DNA strands into nanofibers to create a brand new material that gives off a bright white light. A LED light is coated with the DNA nanofibers, and voila, a salmon DNA lightbulb is born.

While other scientists have experimented with materials like silica nanoparticles and block copolymers to alter the color of light given off by a LED bulb, salmon DNA has proven most successful. Tuning the light quality from cool white to warm white is just a matter of tweaking the ratio of dyes because, according to researchers, "the DNA fibers orient the dyes in an optimum way for efficient [fluorescence energy transfer] to occur." So salmon DNA bulbs could overcome at least one hurdle for LEDs--complaints about brightness.

But despite advances in color tuning, University of Connecticut scientists don't know if their LED bulbs will be cheaper or more energy-efficient than current LED bulbs, which are already more efficient than CFLs and incandescents. And with high-end LED bulbs selling for as much as $80, price will ultimately be the barrier that makes or breaks the success of LEDs in the market.

New York City To Get LED Street Lighting

New York City To Get LED Street Lighting

Written by Jerry James Stone

New York City’s Department of Transportation has tapped the Office for Visual Interaction for testing LED street lighting around the Big Apple. If successful, all of the city’s 300,000 street lamps could one day be made up of LEDs.

Of course, LEDs are just plain awesome! Their power consumption is much lower than that of standard bulbs. Heck, even lower than that of CFLs.

But the OVI contract doesn’t only replace the current high-pressure sodium lighting, but also introduces a whole new lamp pole as well. While I am a fan of LEDs, I am quite fond of the Gotham-styled lamp poles. Keep your paws off, OVI!

Okay, maybe the new poles aren’t so bad. The poles will be between four to six feet, and have up to 100 LEDs each. They will have four light sources per pole, and can create different light patterns. The light footprints can be tailored for parks, street corners or mid-block.

The city will begin testing with a mere six poles, and the testing period will end by fall of 2009. But even if the city approves the highly-efficient lamps, it’s likely they won’t roll out 300-thousand new lamp poles all at once.

Image: dbox