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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Laura,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I have no experience with these lights but I am skeptical of their value in a classroom setting.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">The risk to museum specimens of using lights having more short-wave (actinic, i.e. powerful) light will be a small, but certain increase in changes (damage) to sensitive museum specimens. I can imagine
such lights having some (perhaps even significant) effect in reducing viral, bacterial, and fungal loads in high person-density spaces with low ventilation rates. It seems reasonable to expect their effectiveness to drop rapidly at lower concentrations of
infectious agents as person-density and activity levels (hence breathing rates) are reduced and adequate ventilation is provided.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">While this light may have health advantages in gymnasium locker rooms, I expect it would offer little or no health improvements in classrooms while resulting in a small but certain increase in risk
to specimens.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Understand I am not an authority on health matters but some quick Fermi-like considerations of expected benefits and risks lead us to expect these lights are not appropriate for museum classrooms.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Rob<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu>
<b>On Behalf Of </b>Abraczinskas, Laura<br>
<b>Sent:</b> February 1, 2023 11:41 AM<br>
<b>To:</b> nhcoll-l@mailman.yale.edu<br>
<b>Subject:</b> [Nhcoll-l] Inquiry about installing Germicidal Lighting device (405nm) in museum space<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Does anyone have information about the use of germicidal lighting in museums and effects on collections? I learned today that a device known as “Indigo-Clean” is scheduled to be installed in the Museum’s classroom.
This is a space where specimens (mainly birds, mammals, and vertebrate fossils) are displayed and placed on tables for students to examine during weekly lab sessions. The lights are described as LED Luminaires.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">A university engineer provided the following information and links.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“ Indigo-Clean operates at 405nm which is just outside of UV range. UV is 100 to 400nm. Please use the link for detailed information on this technology.
</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#385623"><a href="https://www.nature.com/articles/s41598-021-97797-0">https://www.nature.com/articles/s41598-021-97797-0</a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="https://kenall.com/Kenall-Files/Product-Files/Sell-Sheets/Indigo-Clean-Technology-Millenium-SimpleSeal_sellsheet.pdf">https://kenall.com/Kenall-Files/Product-Files/Sell-Sheets/Indigo-Clean-Technology-Millenium-SimpleSeal_sellsheet.pdf</a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’d appreciate any advice or information!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks and best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Laura<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">Laura Abraczinskas<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">Pronouns: She, Her, Hers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">Collections Manager, Vertebrate Collections<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">Michigan State University Museum<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">409 West Circle Drive<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">East Lansing, Michigan 48824<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">USA<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif">(517) 355-1290 (Office)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Georgia",serif;color:#201F1E;border:none windowtext 1.0pt;padding:0cm;background:white">Michigan State University occupies the ancestral, traditional, and contemporary Lands of
the Anishinaabeg–Three Fires Confederacy of Ojibwe, Odawa, and Potawatomi peoples. The University resides on Land ceded in the 1819 Treaty of Saginaw.</span></i><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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