"The detail that struck me regarding Robert Irwin’s wall-sized installation wasn’t, at first, the titular light, but the repeated pattern of fuzzy voids: grey amoebas, where the metal ends of tube-shaped bulbs cap the flow of brilliance. Exceptional moments of darkness. Light’s absence, just as much as its presence, is this artist’s medium; through these subtleties of negative space, Irwin doesn’t so much make sculptures as conditions for sensory experience."