Essay On Energy Efficiency Is A Journey Not Destination

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Along the way, demand would rise for these new technologies and increase as new ways were found to use them. This led to more overall energy consumption.

From outer space, you can see the results of this long progression of illumination. More and more of the planet is dotted with clusters of lights.

There is no reason to think that the trend lines for demand for LED lighting will be any different, especially as incomes rise and the desire for this cheaper technology takes hold in huge, emerging economies like China, India and Nigeria, where the sheer volume of the demand will be likely to trump the efficiency gains.

Energy-efficient lighting has been, without question, a boon for economic development. Over the past two centuries, the real cost of illumination in Britain has declined by a factor of 3,000, largely because of efficiency improvements, according to the researchers Roger Fouquet of the London School of Economics and Peter J. G. Pearson of Imperial College, London. This cheap lighting technology is used today not just to light our streets, workplaces and homes but for televisions, computers and cellphones.

These productivity improvements are a primary driver of long-term economic growth. Especially in developing economies, cheap, energy-efficient lighting will almost certainly allow poor people to bring modern lighting into their homes much faster than they otherwise would. And that will almost certainly result in faster growth in energy demand globally.

The growing evidence that low-cost efficiency often leads to faster energy growth was recently considered by both the Intergovernmental Panel on Climate Change and the International Energy Agency. They concluded that energy savings associated with new, more energy efficient technologies were likely to result in significant “rebounds,” or increases, in energy consumption. This means that very significant percentages of energy savings will be lost to increased energy consumption.

The I.E.A. and I.P.C.C. have cited reports estimating that the rebound could be over 50 percent globally. Recent estimates and case studies have suggested that in many energy-intensive sectors of developing economies, energy-saving technologies may backfire, meaning that increased energy consumption associated with lower energy costs because of higher efficiency may in fact result in higher energy consumption than there would have been without those technologies.

That’s not a bad thing. Most people in the world, still struggling to achieve modern living standards, need to consume more energy, not less. Cheap LED and other more efficient energy technologies will be overwhelmingly positive for people and economies all over the world.

But LED and other ultraefficient lighting technologies are unlikely to reduce global energy consumption or reduce carbon emissions. If we are to make a serious dent in carbon emissions, there is no escaping the need to shift to cleaner sources of energy.

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Correction: October 16, 2014

An opinion article on Oct. 9 about LED lighting incorrectly described an estimate that over 50 percent of the global energy reductions made possible by new, more efficient technologies could be negated by a corresponding rise in energy consumption. Estimates of that magnitude have been cited in reports by the International Energy Agency and the Intergovernmental Panel on Climate Change, but have not been endorsed by either entity.

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