Some (if not all) artists use light to aid them in creating art - from Rembrandt's portraits to the basis of photography.
Turrell makes art from light and its next level. Perception theory and psychology has always interested me. I love that Turrell uses light and perception to affect and immerse the viewer. Your perception is your reality and what I experienced at his retrospective is that reality is merely an illusion.
James, you are a genius and Roden Crater is on my bucket list.
Images above are of James Turrell's Skyspace - which is located outside the NGA.
The structure was quite impressive it was like something out of Star Wars or from the Aztec Empire.
Images Shot by Me