Fluorescent Lamps, 1940 ID: 4602 | This file appears in: Nela Park Six years after its first successful test of fluorescent lighting, Nela Park was beginning to produce the lamps in growing quantities, a trend that would accelerate during World War II. In this photo, women test newly manufactured bulbs. | Source: Cleveland State University Library Special Collections Download Original File SourceCleveland State University Library Special Collections "Fluorescent Lamps, 1940" appears in: Nela Park