Fluorescent Lamps Publicly Demonstrated at Major World Fairs

About twice the luminous efficacy of the best incandescent lamps of the period.

Industry, infrastructure and technology changed rapidly between 1938 and 1946, reshaping production, mobility and the material foundations of war and post-war recovery.

The principal source supports the period 1939 for “Fluorescent Lamps Publicly Demonstrated at Major World Fairs”, but it does not justify assigning a single calendar day. WWII CHRONOS therefore preserves the event with a partial date rather than inventing one.

Verified figure or fact: About twice the luminous efficacy of the best incandescent lamps of the period. Physical measurements in WWII CHRONOS are expressed in the metric system.

This electrical engineering / lighting milestone helps explain the material systems behind the era: factories, energy, transport networks, extraction, communications, new materials and production methods.

Where an industrial achievement was tied to war, coercion or forced labour, the technical accomplishment must be read together with that human and political context rather than celebrated in isolation.

Editorial status: Year and core fact verified; no unsupported day assigned. The source below supports the period and central claim; unsupported details have deliberately not been added.

Source: View historical source ↗