For over half a century, the American artist James Turrell has worked directly with light and space to create works that engage viewers with the limits and wonder of human perception. Turrell, an avid pilot who has logged over twelve thousand hours flying, considers the sky as his studio, material. and canvas. “His work is not about light or a record of light; it is light - the physical presence of light made manifest in sensory form. James Turrell   MASS MoCA