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

[William Shepherd]

Hello Laura,

                The use of 405 nm wavelengths as a virucide is new to me, but it's outside my knowledge base. However, these bulbs are within the visible light spectrum so I believe your biggest concern will be the overall light levels. Being that this is a classroom I'm guessing items are in there for short periods of time and are not super significant/delicate.

                CCI (https://www.canada.ca/en/conservation-institute/services/agents-deterioration/light.html) has some information, but you'll need to determine light levels for your specific usage. Light damage is cumulative so even if the classroom has higher levels than recommended, as long as they are stored in dark or low light levels the long-term damage may even out. Ultimately, you have to determine how long you want the items to last and what their expected lifespan is.

William Shepherd (he/him/his)
Collections Officer
Swift Current Museum
44 Robert Street West
Swift Current, Saskatchewan, S9H 4M9
Phone: 306-778-4815

In the spirit of respect and reconciliation, we acknowledge that we are on Treaty 4 territory, the ancestral land of the Cree, Anishinabek, Dakota, Nakota, and Lakota Nations and the homelands of the Métis people.

[cid:image001.jpg at 01D93633.EB280200]

Collection: https://saskcollections.org/swiftcurrent/
Archives: https://memorysask.ca/swift-current-museum
Library: https://www.librarything.com/profile/SwiftCurrentMuseum
Website: http://www.swiftcurrent.ca/museum

From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> On Behalf Of Abraczinskas, Laura
Sent: Wednesday, February 1, 2023 10:41 AM
To: nhcoll-l at mailman.yale.edu
Subject: [Nhcoll-l] Inquiry about installing Germicidal Lighting device (405nm) in museum space

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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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