LSD apostles directly staged light and slide events in New York

Evidence

USCO group, sculptor turned light-artist Jackie Cassen and slide photographer Don Snyder—had been involved in Psychedelic Explorations, a didactic “non-verbal” evocation of “altered consciousness” staged that summer at the New Theater (formerly Arthur!) on East Fifty-Fourth Street under the direction of LSD apostle Timothy Leary. — J. Hoberman, Everything Is Now, 761