Thank you, James Hascall! Your post was very informative, and I wish I had known about the differences in bulbs before we started our project. Our cases were designed with fiber optics in mind, so that wasn't the problem. I think our problem was in not learning enough about fiber optics ahead of time. In hindsight we realized that we were not educated enough to ask the right questions of our contractor. We really do like our system, even with its few bugs. It does provide beautiful light, and the objects in that gallery look better than they ever have. Thanks again, Kathy Henri Ventura County Museum of History & Art Ventura, California ========================================================= 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).