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lighting_efficiency_more [2015/01/30 14:13] tvmendeslighting_efficiency_more [2023/11/16 15:21] (current) – external edit 127.0.0.1
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 +            <div class="bloc single bgWhite">
 +                <header>
 +                    <h2>What can I choose in the calculator?</h2>
 +                </header>
 +                <div class="paddedContent">
 +                    The calculator lets you choose the energy efficiency of lighting in Switzerland in the selected year (2035 or 2050).
 +                </div>
 +            </div>
 +            <div class="bloc single bgWhite">
 +                <header>
 +                    <h2>Lighting Energy Efficiency</h2>
 +                </header>
 +                <img src="https://farm8.staticflickr.com/7386/12579028445_505cf5ae67_z.jpg" alt="image"/>
 +                <small>National Gallery of Art LED Tunnel. Heidi, via Flickr, under CC BY-SA 2.0</small>
 +            </div>
 +            <div class="bloc single bgWhite">
 +                <header>
 +                    <h2>Contents</h2>
 +                </header>
 +                <div class="paddedContent">
 +                    <ul>
 +                        <li>Impact</li>
 +                        <li>Global market</li>
 +                        <li>Definition</li>
 +                        <li>Constraints</li>
 +                        <li>Assumptions</li>
 +                        <li>Value range</li>
 +                        <li>References</li>
 +                    </ul>
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 +                    <h2 class="fl">IMPACT – What is the impact of increasing the energy efficiency of lighting?</h2>
 +                    <div class="clear"></div>
 +                </header>
 +                <div class="paddedContent">
 +                    <div class="bloc triple bgWhite">
 +                        In Switzerland, increasing the energy efficiency of lighting has the following impacts:
 +                        <div class="clear"></div>
 +                    </div>
 +                </div>
 +                <div class="larged">
 +                        <div class="paddedContent">
 +                            <div class="questionAnswer">
 +                                <h4>Energy system</h4>
 +                                <div class="clear"></div>
 +
 +                                <p><img src="lib/exe/fetch.php?media=smiley_face.png" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> Reduces final energy demand, though the saving in electricity will be partly offset by an increased need of heating in the heating season.</p>
 +                                <p><img src="lib/exe/fetch.php?media=smiley_face.png" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> Reduces total electricity consumption.</p>
 +                                <p><img src="lib/exe/fetch.php?media=smiley_face.png" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> Likely to reduce peak loads on grid.</p>
 +                                <p><img src="lib/exe/fetch.php?media=smiley_face.png" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> Likely to increase energy independence and energy security.</p>
 +
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 +                                <h4>Environment & Climate</h4>
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 +                                <p><img src="lib/exe/fetch.php?media=smiley_face.png" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> Very likely to reduce global CO2 emissions.</p>
 +                                <p><img src="lib/exe/fetch.php?media=sad_face.png
 +" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> CFLs contain mercury and require dedicated end of life treatment which is hard to enforce.</p>
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 +                                <p><img src="lib/exe/fetch.php?media=neutral_face.png
 +" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> Likely to have limited impact on the cost of the energy transition.</p>
 +                                <p><img src="lib/exe/fetch.php?media=smiley_face.png" HEIGHT="15" WIDTH="15" BORDER="0" alt="image"/> Reduces total cost of lighting.</p>
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 +                    <h2 class="fl">GLOBAL MARKET – What is the global potential for increasing the efficiency of lighting?</h2>
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 +
 +                        Lighting represents almost 20% of global electricity consumption. This consumption is equivalent  to the amount of electricity generated by a nuclear power. IEA estimates show the total savings potential in residential and services lighting at more than 2.4 EJ per year by 2030.[1]
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 +                    <h2 class="fl">DEFINITION / CONSTRAINTS</h2>
 +                    <div class="clear"></div>
 +                </header>
 +                    <div class="half">
 +                        <div class="paddedContent">
 +                            <div class="questionAnswer">
 +                                <h4>DEFINITION - What is Lighting Efficiency?</h4>
 +                                <div class="clear"></div>
 +
 +                                <p>The switch to lighting devices that require less electrical energy per unit of light intensity (mesured in lumens) provides immediate gains. Compact fluorescent lamps (CFLs) and light emitting diodes (LEDs) are the two most efficient technologes. Compared with a traditional tungsten-filament (incandescent) bulb, CFLs offer a 75% electricity saving and LEDs 80%.</p>
 +                                <p>CFLs and LEDs are available in different forms, with the latter not being suitable for replacement of fluorescent tubes in most settings, though the latter are already quite efficient. Both offer much longer lifetimes than incandescent bulbs.</p>
 +                                <p>In some countries, the sale of some incandescent bulbs is no longer permitted (Switzerland only banned light bulbs of the energy efficiency class F and G).</p>
 +                                <p>Lighting management systems can also reduce electricity consumption in commercial and industrial buildings by switching off lights according to predefined  patterns, or in response to occupancy sensors.</p>
 +                                <p>Passive building measures may also improve daylighting through, for example, window size and orientation, inclusion of light wells and light tubes for rooms without windows. This will reduce electricity demand.</p>
 +
 +                                <div class="clear"></div>
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 +                        </div>
 +                    </div>
 +
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 +                            <div class="questionAnswer">
 +                                <h4>CONSTRAINTS - What are the key barriers facing the increase of Lighting Efficiency?</h4>
 +                                <div class="clear"></div>
 +
 +                                <p>Consumers are reluctant to higher purchase costs (without subsidy) despite lower lifetime costs.</p>
 +<p>‘Rebound effects’ may counteract the energy savings from more efficient appliances. The financial savings from lower running costs can lead to purchase of more appliances, or changes in lifestyle (e.g. wash more often).</p>
 +                                <p>Replacement of old incandescent  bulbs before their failure is perceived by the customers to be an economic incongruity.</p>
 +                                <p>Not all light fittings can accommodate more efficient bulbs.</p>
 +                                <p>Some LEDs and CFLs cannot be dimmed, so wiring is incompatible.</p>
 +                                <p>LEDs and CFLs provide light of a different colour temperature than incandescent or halogen bulbs, which is sometimes felt less attractive and comfortable for the sight.</p>
 +
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 +<!-- /BEGIN VALUE RANGE -->
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 +                    <h2 class="fl">VALUE RANGE - WHAT RANGE OF VALUES CAN I CHOOSE?</h2>
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 +
 +The expected future value ranges for the average [[lighting_performance|lighting performance]] are:
 +  * 2035 -> 0.6 – 0.9 kWh/m2
 +  * 2050 -> 0.4 – 0.6 kWh/m2
 +
 +In 2011 the average electricity consumption per square meter in terms of lighting was 3.2 kWh/m<sup>2</sup> [2].
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 +
 +
 +[1] [[http://www.iea.org/topics/energyefficiency/lighting/|International Energy Agency]]
 +
 +[2] [[http://www.bfe.admin.ch/php/modules/publikationen/stream.php?extlang=de&name=de_564869151.pdf&endung=Die%20Energieperspektiven%20f%FCr%20die%20Schweiz%20bis%202050|PROGNOS 2012, Die Energieperspektiven für die Schweiz bis 2050, Energienachfrage und Elektrizitätsangebot in der Schweiz 2000–2050.]]