Hi Gail,
This is from "The Museum Environment" by Garry Thomson:

Recommended Maximum Illuminances

200 lux- oil and tempera paintings, undyed leather, horn, bone, ivory, oriental lacquer
50 lux - objects sensitive to light, such as textiles, costumes, watercolours, tapestries, prints and drawings, manuscripts, miniatures, paintings in distemper media, wallpapers, gouache, dyed leather.  Most natural history exhibits, including botanical specimens, fur and feathers

UV Radiation

If a light source emits more than about 75 uW/lm (Microwatts per lumen) it requires a UV absorbing filter

Hope this helps.
Sincerely,
David Ryan
Registrar
Colorado Springs Pioneers Museum
www.cspm.org

=========================================================
Important Subscriber Information:

The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes).

If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).