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

2. Artificial Lighting Incandescent Bulbs Delivers 85% of household lighting Delivers 85% of household lighting Light instantly, warm light, excellent color Light instantly, warm light, excellent color Low efficacy Low efficacy Short average operating life Short average operating life Least expensive cost Least expensive cost HOT. HOT. Overall- least efficient 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 Combine popularity of incandescents with efficiency of fluorescents Flicker slightly when turned on Flicker slightly when turned on Cost 3-10 times more than incandescents, last 6-15 times longer Cost 3-10 times more than incandescents, last 6-15 times longer Operate most efficiently within a moderate temperature range 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 Lasts 20 times longer than incandescents, 10 times longer than CFLs More expensive initial cost, yet lower operating cost More expensive initial cost, yet lower operating cost Durable- resistant to thermal and vibration shock Durable- resistant to thermal and vibration shock Typically cast light in one direction at a narrow angle Typically cast light in one direction at a narrow angle Overall- most efficient, still developing Overall- most efficient, still developing http://www.elightbulbs.com/pics/category_icon s/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 South- daylighting and moderating seasonal temperatures North- daylighting, even light, little glare, and no heat North- daylighting, even light, little glare, and no heat East + West- good daylighting in morning and even, high glare, admit 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 North- constant cool illumination East- maximum light and solar heat in morning East- maximum light and solar heat in morning West- afternoon sunlight and heat gain West- afternoon sunlight and heat gain South- greatest potential for winter heat gain, allow unwanted summer 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.” “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 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.. "CFL vs LED - Green Face-off | Greenzer.com." Greenzer. Web. 05 Apr. 2010.. "Energy Savers: Lighting and Daylighting." EERE: Energy Savers Home Page. Web. 05 Apr. 2010.. "Energy Savers: Lighting and Daylighting." EERE: Energy Savers Home Page. Web. 05 Apr. 2010..http://www.eco-smart.org/presentations/1-LED-Lighting-Education.pdf