[Nhcoll-l] Inquiry about installing Germicidal Lighting device (405nm) in museum space

[Dirk Neumann]

Hi Laura,

why are those Indigo-Celan lights at all? To lower a potential (COVID) virus load in the classroom, or for some other reason?

With best wishes
Dirk


Am 02.02.2023 um 21:25 schrieb Robert Waller:
Hi Laura,
I have no experience with these lights but I am skeptical of their value in a classroom setting.
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.
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.
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.
Rob

From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu><mailto:nhcoll-l-bounces at mailman.yale.edu> On Behalf Of Abraczinskas, Laura
Sent: February 1, 2023 11:41 AM
To: nhcoll-l at mailman.yale.edu<mailto:nhcoll-l at mailman.yale.edu>
Subject: [Nhcoll-l] Inquiry about installing Germicidal Lighting device (405nm) in museum space

Hello,
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.

A university engineer provided the following information and links.
“ 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.  https://www.nature.com/articles/s41598-021-97797-0

https://kenall.com/Kenall-Files/Product-Files/Sell-Sheets/Indigo-Clean-Technology-Millenium-SimpleSeal_sellsheet.pdf

I’d appreciate any advice or information!
Thanks and best,
Laura

Laura Abraczinskas
Pronouns: She, Her, Hers
Collections Manager, Vertebrate Collections
Michigan State University Museum
409 West Circle Drive
East Lansing, Michigan  48824
USA

(517) 355-1290 (Office)

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.




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--
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany

Stiftung des öffentlichen Rechts;
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)
Sitz der Stiftung: Adenauerallee 160 in Bonn
Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst
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