Before you worry about filters you should determine how far your
artifacts/items are from the light source and whether or not those
particular items are affected greatly by the light source.
Textiles,Artworks and papers do not appreciate UV light, these are the items
you should be most concerned with when it comes to lighting.  If  there is
sufficient distance from the light source to the artifacts UV light may not
be an issue at all.  If your organization can afford a UV light
indicator(they are expensive over a thousand Bucks!)you can measure the UV
light in your cases to determine if damage is being done.  If you cannot
afford a UV measuring device, such is the case at our place, you can get a
light meter that measures foot candles or Lux(cost of $126.00)and a light
slide rule that determines distance and recomended exposure times for
certain items($20.00).  If you can figure out the slide rule, you can use
that in conjunction with the meter and find out where the lighting is best
for certain delicate items or not.   Light filters help but it is better to
have lighting that is indirect or separated (out side of the display case if
possible)used with filters when deemed neccessary.

Grant Gerlich
Soldiers and Sailors Memorial Hall and Museum
Pittsburgh, PA.
(412)621-4253

>From: Gloucester County Historical Society <[log in to unmask]>
>Reply-To: Museum discussion list <[log in to unmask]>
>To: [log in to unmask]
>Subject: museum lighting
>Date: Thu, 18 Jan 2001 15:52:01 -0500
>
>I am director of a museum that's currently being rewired.  I am
>familiar with plastic sleeves put over florescent lights to cut down
>on UV.  How can I filter UV from light coming from incandescent
>lights?  I mean table lamps, track lighting, chandeliers, etc.  There
>is new UV blocking film on the museum's windows, too.  Thanks for your
>advice.
>
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