In 2007, significant improvements in luminescence performance in the solid-state lighting industry have shown that light-emitting diode (LED) lighting is an alternative to existing lighting technologies, not at some point in the future, but today. A key factor driving people to adopt LED lighting technology is that it can save a lot of energy and reliability for long-term work.
According to the US Department of Energy (DOE) report, 22% of the US electricity is used for lighting, equivalent to the output of 1,000 large power plants, with a total value equivalent to $55 billion. The DOE expects solid-state lighting to reach 150 lm/W (lumens/watt) in less than 10 years, which is equivalent to 10 to 12 times the efficiency of incandescent lamps and twice as much as compact fluorescent lamps. If calculated with such efficiency, it is assumed that replacing 50% of the lighting fixtures with LED lighting fixtures can save 6% to 7% of the electricity used in the United States (saving $17 billion a year). While many people undoubtedly believe that LED lighting can save energy for a long time, they don't think LED lighting can really save energy today. Of course, the initial purchase price of today's LED lighting fixtures may be several times that of traditional lighting fixtures, which limits the use of LED lighting fixtures. However, these first installed LED lighting fixtures indicate that the projected energy savings are real.
Last fall, Wal-Mart announced that it would replace existing systems in cold stores with LED lighting systems in more than 500 warehouses. Wal-Mart's 66% operating expenses are used to purchase electricity, and it is estimated that it will save $3.8 million annually after switching to LED lighting in the cold storage.
In February 2007, Gree and Raleigh City, North Carolina, announced a joint launch of testing and installation to promote the use of LED technology in a variety of conventional lighting applications. The start of “LED City†(AnnArbor and Toronto were subsequently added) indicates that there is a “real lab†to assess the perception of LED lighting and the economic and environmental impact of residents in these cities.
According to the US Department of Energy (DOE) report, 22% of the US electricity is used for lighting, equivalent to the output of 1,000 large power plants, with a total value equivalent to $55 billion. The DOE expects solid-state lighting to reach 150 lm/W (lumens/watt) in less than 10 years, which is equivalent to 10 to 12 times the efficiency of incandescent lamps and twice as much as compact fluorescent lamps. If calculated with such efficiency, it is assumed that replacing 50% of the lighting fixtures with LED lighting fixtures can save 6% to 7% of the electricity used in the United States (saving $17 billion a year). While many people undoubtedly believe that LED lighting can save energy for a long time, they don't think LED lighting can really save energy today. Of course, the initial purchase price of today's LED lighting fixtures may be several times that of traditional lighting fixtures, which limits the use of LED lighting fixtures. However, these first installed LED lighting fixtures indicate that the projected energy savings are real.
Last fall, Wal-Mart announced that it would replace existing systems in cold stores with LED lighting systems in more than 500 warehouses. Wal-Mart's 66% operating expenses are used to purchase electricity, and it is estimated that it will save $3.8 million annually after switching to LED lighting in the cold storage.
In February 2007, Gree and Raleigh City, North Carolina, announced a joint launch of testing and installation to promote the use of LED technology in a variety of conventional lighting applications. The start of “LED City†(AnnArbor and Toronto were subsequently added) indicates that there is a “real lab†to assess the perception of LED lighting and the economic and environmental impact of residents in these cities.
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