Microfading Tester International Discussion Group

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LED choices for Scientific MFT Instytut Fotonowy

Erin Mysak posted 11-10-2025 16:38

I am looking for suggestions as to which additional 5 LEDs would make a good range in the purchase of the LED Changer for the Scientific MFT (Instytut Fotonowy). As you know, the 2700K is mandatory.

The lighting conditions in our repositories range widely because we have over 70 older buildings (various lighting sources and window types) with exhibition space and study/research areas where the collections can be used and displayed.

For example, I'm considering getting three additional White LEDs ( 3000, 4000 and 5700?) and two monochromatic ones (365nm and ??). Does anyone have experience with an LED selection they are satisfied covers a wide range of conditions? Does anyone wish they had done something a bit differently when selecting their 5 LEDs?

Thank you so much in advance for any thoughts you may have!

Erin

Erin R. Mysak, Ph.D. (she/her)

Scientist

Harvard Library Preservation Services

90 Mount Auburn Street, Cambridge, MA 02138

erin_mysak@harvard.edu

Vincent Beltran posted 11-17-2025 15:39

Dear Erin,

Apologies for the delayed response. At the GCI, we're currently reconfiguring the two LED changers for our Fotonowy MFT.

The first will contain a suite of white LEDs and UV: 2700K, 3000K, 3500K, 4500K, 5500K, 365nm

The second will contain one white LED and a suite of narrow band LEDs: 3000K, 405nm, 450nm, 530nm, 605nm, 660nm

Originally, we had a 5500K LED on the second changer, but found that our colleagues were mostly interested in testing with a 3000K LED; so, we wanted to make sure the 3000K was available on both changers. Additionally, the spectra of the 3000K and 5500K LEDs are markedly different; below is a comparison of the SPDs.

I wasn't aware that a 2700K LED was mandatory.

Hope this helps!