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Compact fluorescent light (CFL) bulbs have provided a much more energy-efficient source of lighting than incandescent bulbs and have allowed for significant savings on electric bills. But CFLs may be just a transition step to an even more efficient form of lighting - the light emitting diode (LED). As explained by Michael V. Copeland, a writer for Fortune, LEDs operate based on a different technology than incandescent bulbs or CFLs. Incandescent bulbs emit light when the electrical resistance causes the filament to heat up and glow. Most of the energy is released as heat and a little bit as light. CFLs emit light by introducing an electric arc to excite mercury atoms inside the glass tube. LEDs use a diode, similar to computers, and when electrons pass from one side of a semiconductor material to another they give off a photon of light. The color of the light depends on the semiconductor material used to make the diode. According to Copeland, businesses are switching to LEDs because of the cost savings they can achieve through energy efficiency over the long run. Individual consumers may be reluctant to spend the initial $30 to $40 an LED bulb can cost. But according to a cost comparison on the eartheasy website, the total cost of using one LED bulb with an equivalent of 60 watts for 50,000 hours of lighting is estimated at $95.95. You would need 5 CFLs to get the same lighting at a total cost of $159.75, or 42 incandescent bulbs at a total cost of $652.50. Over time the savings with LEDs increase proportionately. Cree, Inc. is a U.S. technology company based in Durham, North Carolina that could benefit from the shift toward LED lighting. The company develops and manufactures LED lighting products and components. In a press release on February 3, 2010, the company announced that it had developed a white power LED that achieved 208 lumens per watt efficacy, breaking what had been an elusive barrier of 200 lumens per watt. The LEDs produced by Cree, Inc. are used in various applications such as video screens, gaming displays, function indicator lights, automotive backlighting. The company is also gaining contracts to provide public lighting with LEDs. As reported by Jeff Drew for the Triangle Business Journal, Anchorage and Valdez in Alaska have joined the Cree LED City initiative and are in the process of converting all their street lights to LEDs. These cities join Raleigh and Chapel Hill in North Carolina; Austin and Fairview in Texas; Indian Wells, California; Ann Arbor, Michigan; Danville, Virginia, and Boston, Massachusetts. On February 10, 2010, Cree, Inc. announced that Arizona State University had joined the Cree LED University® program and will be installing Cree LEDs in six of its parking structures and in the Sandra Day O'Connor School of Law rotunda. Arizona State University joins various other universities across the U.S. that are participating in the switch to LEDs. Cree, Inc. also announced on February 25, 2010 that the Hyatt Regency Grand Cypress Resort in Orlando, Florida has installed Cree LEDs in its 54 hallways and in its newly refurbished 10,000-square-foot lobby. Cree, Inc.'s total revenue and gross profit have been steadily rising. The company reported total revenue of over $567 million and a gross profit of almost $212 million for the year ended June 28, 2009. This compares to total revenue of a little over $493 million and gross profit of almost $166 million for the year ended June 29, 2008. The company invested about $71 million in research and development in 2009, up from around $59 million in 2008. Sources: Arizona State University Joins Cree LED University® Program - Cree, Inc. Cree, Inc. (CREE) - Yahoo Finance Cree Breaks 200 Lumen Per Watt Efficacy Barrier - Cree, Inc. Hyatt Regency Grand Cypress Resort Lights Up with Cree LED Lighting - Cree, Inc. Jeff Drew, Valdez, "Alaska, becomes a Cree LED City" - Triangle Business Journal LED Light Bulbs: Comparison Charts - eartheasy Michael V. Copeland, "The light bulb goes digital" - Fortune |
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Led Glow - Blog Homepage Results
Wait, did you say Sasha AND Digweed? Yeah, this is a ridiculous video - they brought their own LED visuals panel and set it on the DJ booth! Only at http://clubGLOW.com http://DCclubbing.com
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