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Energy Efficiency of Lighting

Energy Efficiency of Lighting. Skyler Valenzuela Laura Tschaplinski. http://products.mercola.com/Images/light-bulbs/energy-efficiant.jpg. Artificial Lighting. Incandescent Bulbs Delivers 85% of household lighting Light instantly, warm light, excellent color Low efficacy

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Energy Efficiency of Lighting

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  1. Energy Efficiency of Lighting Skyler Valenzuela Laura Tschaplinski http://products.mercola.com/Images/light-bulbs/energy-efficiant.jpg

  2. Artificial Lighting • Incandescent Bulbs • Delivers 85% of household lighting • Light instantly, warm light, excellent color • Low efficacy • Short average operating life • Least expensive cost • HOT. • Overall- least efficient http://www.energysavers.gov/your_home/lighting_daylighting/index.cfm/mytopic=12120

  3. Artificial Lighting • CFLs (Compact Fluorescent Lamps) • Combine popularity of incandescents with efficiency of fluorescents • Flicker slightly when turned on • Cost 3-10 times more than incandescents, last 6-15 times longer • Operate most efficiently within a moderate temperature range http://renaissanceronin.files.wordpress.com/2008/10/cfl.jpg http://www.smud.org/en/rebates/PublishingImages/cfl-lamps.jpg

  4. Artificial Lighting • LED (Light-emitting diodes) • Lasts 20 times longer than incandescents, 10 times longer than CFLs • More expensive initial cost, yet lower operating cost • Durable- resistant to thermal and vibration shock • Typically cast light in one direction at a narrow angle • Overall- most efficient, still developing http://www.elightbulbs.com/pics/category_icons/main_category_footer_08.jpg

  5. Flood vs. Spot Lights • general lighting: lighting designed to provide a substantially uniform illuminance throughout an area, exclusive of any provision for special local requirements • accent lighting: directional lighting to emphasize a particular object or to draw attention to a part of the field of view • directional lighting: illumination on the work-plane or on an object predominantly from a single direction.

  6. Natural Lighting • Efficient use of windows reduce the need for artificial lighting during the day • South- daylighting and moderating seasonal temperatures • North- daylighting, even light, little glare, and no heat • East + West- good daylighting in morning and even, high glare, admit heat http://www.interiorandhealth.com/blog/wp-content/uploads/2008/02/light1.jpg

  7. Natural Lighting • Skylights • North- constant cool illumination • East- maximum light and solar heat in morning • West- afternoon sunlight and heat gain • South- greatest potential for winter heat gain, allow unwanted summer heat gain http://www.bosworthroofing.com/images/skylights_2.jpg

  8. Natural Lighting • Light tubes • “A clear, unbreakable polycarbonate dome mounted on a storm-tested, aluminum flashing on the roof directs sunlight down into the area below through a high-performance reflective transfer tube. This tube connects to a domed translucent diffuser that distributes natural light evenly throughout the area without heat gain.” • No replacement for lighting at night, but may complement electric lights to reduce energy costs http://greenbydesign.com/wp-content/uploads/2008/10/natural_lighting_solatude.jpg

  9. Bibliography "About Sun Dome Tublar Skylights, Skylight Manufacturer, Natural Lighting and Color Rendering by Sun Dome." Sun Dome Tublar Daylight Skylights. Web. 05 Apr. 2010. <http://www.sun-dome.com/tubular_skylight_features.html>. "CFL vs LED - Green Face-off | Greenzer.com." Greenzer. Web. 05 Apr. 2010. <http://www.greenzer.com/face-off_5>.  "Energy Savers: Lighting and Daylighting." EERE: Energy Savers Home Page. Web. 05 Apr. 2010. <http://www.energysavers.gov/your_home/lighting_daylighting/index.cfm/mytopic=11970>. http://www.eco-smart.org/presentations/1-LED-Lighting-Education.pdf

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