https://www.designingbuildings.co.uk/w/index.php?action=history&feed=atom&title=Lighting_efficacy 2026-05-30T03:11:07Z Revision history for this page on the wiki MediaWiki 1.17.4 https://www.designingbuildings.co.uk/w/index.php?title=Lighting_efficacy&diff=272060&oldid=prev 2024-03-11T06:24:56Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 06:24, 11 March 2024</td> </tr><tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[https://www.cibse.org/knowledge/knowledge-items/detail?id=a0q20000008I79NAAS Rules of Thumb, Guidelines for building services (5th Edition) BG 9/2011], by Glenn Hawkins, published by BSRIA in 2011, defines lighting efficacy as: ‘The amount of light (luminous flux) produced by a light bulb or other light source, usually measured in lumens, as a ratio of the amount of power consumed to produce it, usually measured in watts.’</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[https://www.cibse.org/knowledge/knowledge-items/detail?id=a0q20000008I79NAAS Rules of Thumb, Guidelines for building services (5th Edition) BG 9/2011], by Glenn Hawkins, published by BSRIA in 2011, defines lighting efficacy as: ‘The amount of light (luminous flux) produced by a light bulb or other light source, usually measured in lumens, as a ratio of the amount of power consumed to produce it, usually measured in watts.’</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[https://www.bsria.com/uk/product/Bwxegr/useful_information_guide_bg_872024_a15d25e1/ BG 87/2024, Useful Information Guide], written by Chin Hang “Kay” Lam and published by BSRIA in 2024, defines lighting efficacy as: ‘A measure of how much light a light source produces for the energy put in to it. This is normally expressed in lm/W (lumens per watt).’</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>--[[User:BSRIA|BSRIA]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>--[[User:BSRIA|BSRIA]]</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 5:</td> <td colspan="2" class="diff-lineno">Line 7:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>See also: Lamp efficacy.</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>See also: Lamp efficacy.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&minus;</td><td style="background: #ffa; color:black; font-size: smaller;"><div>= Related articles on Designing Buildings <del class="diffchange diffchange-inline">Wiki </del>=</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>= Related articles on Designing Buildings =</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&minus;</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* BSRIA articles <del class="diffchange diffchange-inline">on Designing Buildings Wiki</del>.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* BSRIA articles.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* BSRIA definitions.</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* BSRIA definitions.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* BSRIA.</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* BSRIA.</div></td></tr> </table>

Designing Buildings https://www.designingbuildings.co.uk/w/index.php?title=Lighting_efficacy&diff=212062&oldid=prev 2021-08-30T11:17:03Z

<p>Created page with &quot;[https://www.cibse.org/knowledge/knowledge-items/detail?id=a0q20000008I79NAAS Rules of Thumb, Guidelines for building services (5th Edition) BG 9/2011], by Glenn Hawkins, publish...&quot;</p> <p><b>New page</b></p><div>[https://www.cibse.org/knowledge/knowledge-items/detail?id=a0q20000008I79NAAS Rules of Thumb, Guidelines for building services (5th Edition) BG 9/2011], by Glenn Hawkins, published by BSRIA in 2011, defines lighting efficacy as: ‘The amount of light (luminous flux) produced by a light bulb or other light source, usually measured in lumens, as a ratio of the amount of power consumed to produce it, usually measured in watts.’<br /> <br /> --[[User:BSRIA|BSRIA]]<br /> <br /> See also: Lamp efficacy.<br /> <br /> = Related articles on Designing Buildings Wiki =<br /> <br /> * BSRIA articles on Designing Buildings Wiki.<br /> * BSRIA definitions.<br /> * BSRIA.<br /> * Building services.<br /> * Lamp efficacy.<br /> * Lamp.<br /> * Lighting.<br /> * Lumens.<br /> * Luminous flux.<br /> <br /> [[Category:DCN_Definition]] [[Category:Definitions]] [[Category:Standards_/_measurements]]</div>

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