Lumafabriken, Former light bulb factory in Hammarby, Sweden
Lumafabriken is a former light bulb factory in Hammarby with a white cubic structure featuring three parallel wings extending toward the water. Long bands of windows run across the facade, and a glass-enclosed testing room sits at the top.
In 1930, the Kooperativa Förbundet established this factory to break the European light bulb cartel controlled by Philips and Osram. The facility helped reduce prices for standard lamps significantly across the market.
The building shows Swedish functionalist design from the 1930s with clean lines and large bands of windows that became typical of industrial architecture of that era. Its white facade and three-wing structure still define the Hammarby waterfront today.
The complex has been renovated into modern offices under the name Luma Park while retaining its status as a protected historical industrial landmark. Visitors can freely explore the exterior architecture and grounds.
The glass testing room on the roof served practical purposes but also acted as a visible signature of the factory. At night it glowed and became a recognizable symbol for boats passing on the water below.
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