“Light and Language,” an exhibition showcasing the late land and conceptual artist Nancy Holt, opens at Ireland’s Lismore Castle Arts. Focused on 1960-80s works, it notably includes Electrical System (1982, image), a room-scale illuminated network shown for the first time in three decades that makes the gallery it is presented in “part of open-ended systems, part of the world.” The Lisa Le Feuvre-curated show also includes related (light)works by Dennis McNulty, Charlotte Moth, and Katie Paterson.