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<div class="moz-cite-prefix">.. depending on the quality of the LED bulbs, they can be a great opportunity to significantly reduce UV-emissions and UV-induced damage, e.g. compared to old neon lights. But not all are. </div>
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<div class="moz-cite-prefix">Also, retrofitting old neon light sockets with modern LED bulbs however may create problems and should be considered with great care, because old and especially historic ballast units may fail and even start burning.</div>
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<div class="moz-cite-prefix">This is also mentioned in the CCI Technical Bulleting Dee just shared (thanks for sharing!)</div>
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<div class="moz-cite-prefix">All the best</div>
<div class="moz-cite-prefix">Dirk<br>
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<div class="moz-cite-prefix">Am 23.01.2025 um 19:38 schrieb Callomon,Paul:</div>
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<p class="MsoNormal">Changing to LEDs makes sense in many ways. They consume a fraction of the energy used by incandescent or even fluorescent bulbs, and do not get anywhere near as hot. Both factors reduce stress on older light fixtures and thus the danger
of sparking. They do not have ballasts, unlike fluorescents, and are a straight swap-out.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The only possible issue is that their color temperature tends to be higher than that of incandescents. Some LED bulbs can be configured to “cool” or “warm” modes with a switch, but most are set at the factory. Cool LEDs can change the visual
perception of colors in exhibits and shared spaces, though that can also be good – many dioramas and specimen displays look better with higher color temperature lighting, and up to now that has often been achieved with halogen bulbs that get very hot indeed
and eat a lot of power. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">One caveat is that the optimistic durability figures many makers give – “lasts seven years!” are just that, optimistic. These bulbs are almost all made in China and to keep the price down, the QC is not all it might be. I’ve had them fail
or start flickering (which can’t be fixed) in less than a year in some cases. <o:p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;mso-ligatures:standardcontextual">Paul Callomon</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;mso-ligatures:standardcontextual"><br>
<i>Collection Manager, Malacology and General Invertebrates</i></span><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-ligatures:standardcontextual">Academy of Natural Sciences of Drexel University, Philadelphia</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;mso-ligatures:standardcontextual"><br>
<i><a href="mailto:callomon@ansp.org" moz-do-not-send="true" class="moz-txt-link-freetext">callomon@ansp.org</a> Tel 215-405-5096 - Fax 215-299-1170</i></span><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Nhcoll-l
<a class="moz-txt-link-rfc2396E" href="mailto:nhcoll-l-bounces@mailman.yale.edu">
<nhcoll-l-bounces@mailman.yale.edu></a> <b>On Behalf Of </b>Angela Hornsby<br>
<b>Sent:</b> Thursday, January 23, 2025 1:29 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:nhcoll-l@mailman.yale.edu">
nhcoll-l@mailman.yale.edu</a><br>
<b>Subject:</b> [Nhcoll-l] LED lights in collections<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p><b><span style="font-family:"Arial",sans-serif;font-variant:small-caps;color:black">External.</span></b><b><span style="font-family:"Arial",sans-serif;font-variant:small-caps"><o:p></o:p></span></b></p>
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<p class="MsoNormal" style="margin-left:.5in">Hi everyone,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Our campus facilities management would like to change all of our general lighting in non-public collections spaces (dry and wet) to LEDs. I haven't found any sources suggesting major negatives (e.g.,
<a href="https://www.nps.gov/museum/publications/mhi/chap4.pdf" moz-do-not-send="true" class="moz-txt-link-freetext">
https://www.nps.gov/museum/publications/mhi/chap4.pdf</a>).<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Does anyone have experience with the change to LEDs, particularly any unanticipated effects?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Thanks,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Angela<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">-- <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="color:#222222">Angela Hornsby, Ph.D. (she)</span>
<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="color:#222222">Zoological Collections Manager (MMNH / JFBM)<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="color:#222222">Bell Museum<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="color:#222222">University of Minnesota<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="color:#222222"><a href="https://www.bellmuseum.umn.edu/zoological-collections/" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://www.bellmuseum.umn.edu/zoological-collections/</a></span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="color:#222222"><o:p> </o:p></span></p>
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<pre wrap="" class="moz-quote-pre">_______________________________________________
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