Welcome Ron, and sorry for lack of clarification

sources for lights for museum exhibits may be found through the American
Association of Museums website

www.aam-us.org

on the right side of their home page is a block that says Museum
Marketplace On-line; click that block and on the Select a Category-
click and scroll down to Lighting Services.  You may also choose country
of choice for those sources closest to you.  Then click Go! and the
database will pull up several companies that have lights for
exhibitions.

Sometimes, companies that sell products under the category of Natural
and Ecologically safe materials have full-spectrum lights and other
kinds of lights that are non-UV from which heat damage is possible to
your plate negatives- but I'm not sure how well these have been tested
for art and historical objects.

If my history memory serves correct, Matthew Brady's photgraphic glass
plates from the Civil War afterwards were used as building materials for
greenhouses andthe images subsequently burned off from exposure to the
sun.  A bit extreme, but the point is illustrated.

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