Issued in 1984, fourth issue in the Light Campaign series. The Light Campaign illustrations were an important part of the great campaign that sold modern electric light to America. Approved by the Rockwell Society of America and crafted by Knowles China in an edition strictly limited to a maximum of 150 firing days. The Light Campaign plate series began in 1983 and consists of six plates. Numbered and signed, 8.5" wide, excellent condition. Comes with box and certificate.