https://www.designingbuildings.co.uk/w/index.php?action=history&feed=atom&title=LumenLumen - Revision history2026-05-30T13:14:43ZRevision history for this page on the wikiMediaWiki 1.17.4https://www.designingbuildings.co.uk/w/index.php?title=Lumen&diff=299169&oldid=prevEditor at 08:19, 27 March 20252025-03-27T08:19:05Z<p></p>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Lumen is most commonly used in reference to lighting or illuminance. The lumen is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System of Units.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Lumen is most commonly used in reference to lighting or illuminance. The lumen is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System of Units<ins class="diffchange diffchange-inline">. The technical definition of a lumen is one candela multiplied by one steradian, a measurement of the amount of light that is contained in a certain area</ins>.</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Lumen, <del class="diffchange diffchange-inline">however </del>also refers to an element in the structure of wood or timber. The lumen is the hollow centre of a cell<del class="diffchange diffchange-inline">. Hardwoods </del>may be divided into ring-porous and diffuse-porous trees. In ring-porous trees the vessels laid down at the beginning of the growing season are much larger than subsequent vessels laid down at the end of the season (or ring)</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Lumen <ins class="diffchange diffchange-inline">is also used in contemporary computer aided design</ins>, <ins class="diffchange diffchange-inline">in particular 3D modelling and rendering. Lumen is a commonly used render technique, which takes into consideration lighting effects for more realistic renders.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Lumen is </ins>also <ins class="diffchange diffchange-inline">a term used in biology, coming from the is Latin lumen, meaning an opening, which may describe the inside space of a tubular structure, such as an artery or intestine. In the same light lumen is used in material science, in particular it </ins>refers to an element in the structure of wood or timber. The lumen is the hollow centre of a cell<ins class="diffchange diffchange-inline">, where hardwoods </ins>may be divided into ring-porous and diffuse-porous trees. In ring-porous trees the vessels laid down at the beginning of the growing season are much larger than subsequent vessels laid down at the end of the season (or ring)</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Articles_needing_more_work]] [[Category:Disambiguation]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Articles_needing_more_work]] [[Category:Disambiguation]]</div></td></tr>
</table>Editorhttps://www.designingbuildings.co.uk/w/index.php?title=Lumen&diff=299168&oldid=prevEditor at 08:13, 27 March 20252025-03-27T08:13:01Z<p></p>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">#redirect</del>:[[<del class="diffchange diffchange-inline">Illuminance|Illuminance</del>]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Lumen is most commonly used in reference to lighting or illuminance. The lumen is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System of Units.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Lumen, however also refers to an element in the structure of wood or timber. The lumen is the hollow centre of a cell. Hardwoods may be divided into ring-porous and diffuse-porous trees. In ring-porous trees the vessels laid down at the beginning of the growing season are much larger than subsequent vessels laid down at the end of the season (or ring)</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[[Category</ins>:<ins class="diffchange diffchange-inline">Articles_needing_more_work]] </ins>[[<ins class="diffchange diffchange-inline">Category:Disambiguation</ins>]]</div></td></tr>
</table>Editorhttps://www.designingbuildings.co.uk/w/index.php?title=Lumen&diff=69480&oldid=prevDesigning Buildings: Redirected page to Illuminance2017-02-09T11:33:04Z<p>Redirected page to <a href="/wiki/Illuminance" title="Illuminance">Illuminance</a></p>
<p><b>New page</b></p><div>#redirect:[[Illuminance|Illuminance]]</div>Designing Buildings