Why Having A Realistic View of Energy Efficiency Matters to Climate Change

Energy Efficiency and Climate Change

In response to our New York Times op-ed about the limits of energy efficiency and the furious reaction to it from some quarters, Andy Revkin asks whether we can find room for agreement on the rebound effect. And to some degree we already have.[read more]


Will LEDs Trigger Rebound Effects? Examining the Key Evidence

November 3, 2014 by Jesse Jenkins

Rob Day argues that the rebounds in energy demand triggered by energy efficient lighting have been overblown. This rebuttal sets the record straight, and does so by exploring the key evidence in the debate over the magnitude of rebound effects.[read more]

The Wireless, Networked LED Goes Standard

March 30, 2014 by Jeff St. John

Smart, networked lighting may the next big market for building energy efficiency and automation technology. But the market is a battleground of proprietary tech: different networks, linking up different lighting systems, in a landscape that leaves little room for future mix-and-match interoperability.[read more]

Friday Energy Facts: LED Bulb Efficiency Expected to Continue Improving as Cost Declines

March 21, 2014 by U.S. EIA: Today in Energy

LED Efficiency and Cost

Technology improvements for general service lighting, driven by federal efficiency standards, are leading to increased reliability and bulb life. As efficiency increases, residential electricity consumption for lighting declines over time.[read more]

Why Aren't We Talking About Net Energy Metering for LEDs?

March 19, 2014 by Catherine Wolfram

Net Metering for LEDs

Net metering means that my utility will credit me for the “extra” power my solar energy system generates at times of low energy consumption and charge me based on the difference between my total consumption and my total solar production, i.e. my net consumption.[read more]

SAP’s Palo Alto energy efficiency and CO2 reductions

December 15, 2010 by Tom Raftery

As mentioned previously, I was in Santa Clara and Palo Alto last week for a couple of SAP events. At these events SAP shared some of its carbon reduction policies and strategies. According to SAP Chief Sustainability Officer Peter Graf, the greatest bang for buck SAP is achieving comes from the deployment of telepresence suites. With...[read more]

How to Build a Cleantech Company Without Huge Investment Capital: A Case Study

May 19, 2010 by David Gold

While many cleantech companies require very large amounts of capital in order to get to market, there is a quiet group of cleantech companies bucking that trend.  Companies like Heartland Biocomposites (Green Building Materials), RealTech (Water Testing) and TerraLUX  (LED Lighting) all built significant and growing businesses...[read more]

Move Over OLEDs: Scientists Create Cheap, Fully Recyclable Lighting Material

February 9, 2010 by Big Gav

TreeHugger has a post on using graphene for energy efficient lighting - Move Over OLEDs: Scientists Create Cheap, Fully Recyclable Lighting Material. Swedish and American researchers have just developed a fully recyclable lighting component with what Science Daily is terms a "new super material": graphene. Graphene is both inexpensive to...[read more]

Forget mobile phone chargers – they are not the problem!

February 2, 2010 by Tom Raftery

I participated in the recent IBM Global Eco Jam and there were some fantastic discussions there. One of the discussions surprised me though – people were still talking about unplugging mobile phone chargers as if that was a significant problem. It is not. On the contrary, it is a dangerous distraction. Watch the video above....[read more]

Snow and LED traffic lights

January 7, 2010 by Lynne Kiesling

The snowy weather across much of the northern hemisphere this week is being disruptive in many ways. At the Freakonomics blog, Eric Morris highlights one unanticipated and unintended disruption — snow obscuring energy-efficient LED traffic lights: The biggest weakness of LEDs is their biggest strength – they don’t radiate much heat....[read more]

Philly’s traffic lights switch to LEDs

August 18, 2009 by ToddWallace

Philadelphia will switch the incandescent bulbs in all traffic lights to more energy efficient LEDs. Though substantially more expensive than incandescent lights - a 12-inch unit costs as much as $155, compared with $3 for an incandescent - LEDs have other advantages. They last five to 10 years, so they require much less maintenance...[read more]

Can Energy Efficient Incandescents Compete?

July 14, 2009 by Peter Troast

Can second-generation incandescents really match this? (It's a CFL). Are incandescent lightbulbs making a comeback? And if so, is it worth it?   Two years ago Congress passed a new lighting efficiency law scheduled to take effect in 2012.  When the law was written, there were no incandescent lightbulbs on the market that...[read more]

GE demonstrates roll-to-roll organic LED manufacturing

March 11, 2008 by Tyler Hamilton

The cost of manufacturing organic LEDs will need to fall dramatically if they're ever going to be a competitive lighting technology -- i.e. attractive to mainstream consumers. GE announced today it has demonstrated a roll-to-roll manufacturing process that spits out organic light-emitting diodes the same way newspaper presses spit out...[read more]