we are surrounded by 5 superb paper cutouts done by henri matisse towards the end of his career in the early 1950s. this is a sky-lit gallery, and what we have done is to cover over the skylights. there is no uv in this room. we use artificial lights that have no uv coming out of them. all light is damaging, but uv is probably the most damaging, particularly to works of art on paper. we can lower the light levels, which we have done, to about 5 footcandles. now, 5 footcandles is about the lowest reading that you will see in a museum setting. if you were to go down in a painting gallery, you might see a footcandle reading of 30 to 40 footcandles. the difference is, with works of art on paper, the light is much more damaging. this is an illuminance meter. actually, we call it a footcandle meter because it takes readings in footcandles. 363 days of the year, you can come here and see matisse's cutouts, but you can only see them for 4 hours per day, not 7 or not 8. that means that we have effectively reduced the exposure time by about half. that's good for the cutouts, and it's good for th