Milk Run, 1996
When Turrell began painting with light, it was with aggressive, obvious strokes. But as time went on, he realized that by hitting the dimmer switch, he could trigger a different kind of perceptual sensation. The "Milk Run" series might be the most successful of his subtler works. Enclosed in a dark room, this projection gives the illusion of a portal, visible only after the eyes adjust to the (absence of) light. Darkness becomes visible.