LED lamps and lightbulbs are solid-state devices that use light-emitting diodes as the source of light. LED lighting offers longer service life and high energy efficiency than incandescent or fluorescent bulbs, but as an emerging consumer technology, remains more expensive than both.
After two years of repositioning one of the largest corporations in the world, General Electric CEO Jeff Immelt said that the company is "back on offense."
December 16, 2010 8:24am |
Although the retailer has been giving away 5 percent of its profits for the community good since 1946, this is the first time it has set formal environmental goals.
2 | December 13, 2010 5:22am |
Researchers at the University of California at Berkeley show of their quadrotor helicopter and give SmartPlanet an exclusive look at what it takes to hack Microsoft's Kinect.
6 | December 7, 2010 12:21am |
The key is doing different things each day.
4 | November 24, 2010 7:30am |
Guided by 3-D imagery, femtosecond lasers can slice up a cloudy lens with more precision and fewer nicks and tears.
3 | November 17, 2010 11:23pm |
A new type of light can kill superbugs in the air and on exposed surfaces. Experts expect the light technology to help ease up hospital infections.
21 | November 15, 2010 8:29am |
Sleek, solar-powered stations accommodating more than 1,000 bikes have arrived in the nation's capital. D.C. introduces its $5 million bike share program, modeled after Montreal's.
8 | November 15, 2010 2:00am |
Italy integrates power generation and transportation on the A18 with a large road project in sunny Sicily.
1 | November 12, 2010 7:15am |
Turns out many of the advances happening in production technology could have very real environmental and energy efficient benefits.
November 11, 2010 12:52pm |
By changing the properties of conventional semiconductor wafers, engineers have opened the door to such devices as light-emitting diodes on a suture thread and even implantable biomedical tattoos.
5 | November 11, 2010 4:00am |
A massive contrail off the coast of California is certainly unusual, but a look back at a similar scare points to jet contrails, not rocket smoke.
26 | November 9, 2010 11:55am |
Municipal and state governments also demonstrate strong leadership, according to latest EPA Green Power Top 50 ranking.
November 2, 2010 4:14am |
LED lighting firm Cree added color rendering index options to its XLamp line of LED bulbs, bringing improved color accuracy to energy-efficient bulbs.
November 1, 2010 7:53am |
Investing in solar or wind is like printing money, according to Pro-tech Energy Solutions principal John Drexinger. I spoke with him about bringing New Jersey on-board with renewables.
2 | October 26, 2010 8:28am |
The solid-state age is upon us: GE and University of Maryland researchers have demonstrated an LED light bulb that's smaller, lighter and brighter -- thanks to jet engine cooling technology.
5 | October 21, 2010 11:40am |
France, Britain and Germany are at odds with each other over the future of rail travel between their respective nations.
3 | October 19, 2010 12:45pm |
A proposed installation outside of Abu Dhabi would harness the power of more than a thousand blade-less, waving stalks.
6 | October 15, 2010 3:00pm |
It's a system so inconsistent and disorderly that an attack against the national--or even a regional--power grid may be technologically impossible.
6 | October 14, 2010 2:30pm |
Transportation topped smart grid and biofuels in cleantech investment in the third quarter of 2010, according to a new report. Here's a breakdown of the numbers.
October 4, 2010 6:51am |
While refining their approach to crafting nanowires, NIST chemists stumbled across a way to make them produce light just like an LED bulb.
1 | September 30, 2010 7:12am |