Automan_Empire - 5:07 am on Nov 26, 2012 (gmt 0)

For the museum and archival sectors, there are UV blocking window films and light fixture filters that pass the visible spectrum unaffected but have a sharp cutoff at the near UV portion of the spectrum. In other words, it is possible to have full daylight illumination without the fading UV.

Also, certain types of gas discharge bulbs emit mad quantities of UV if the fixture or outer glass envelope of the bulb is broken.