[labnetwork] LED lights in photosensitive areas - yellow lens needed?

[Dennis Schweiger]

Frank,

we just upgraded all of our T-12 tubes to LED, and through testing, found
that the LED still needed to have a filter.  I've attached a cut sheet of
the filter we installed.  We found that our existing "yellow" filters
weren't cutting out enough of the 400-500nm spectrum.

Dennis Schweiger
University of Michigan/LNF
Facilities Manager

734.647.2055 Ofc

On Fri, Jul 7, 2017 at 12:57 PM, Frank Gavin <fgavin at wafabintl.com> wrote:

> Hello everyone
>
>
>
> We are suppliers of wet process equipment and one of our vendors of HEPA
> and ULPA fan/filter units tells us that we do not need to add yellow lens
> covers over LED light because such lights do not emit ultraviolet light.  I
> am always suspicious of simple convenient solutions so I want to put this
> statement out to this learned community and learn if this statement is
> true.  Perhaps some members have experience using LED lights in
> photosensitive areas of their fab and would care to comment?
>
>
>
>
>
> Best Regards,
>
> FRANK GAVIN, Sales Eng.
>
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