Shibuya shopping district, Tokyo, Japan

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Signage: From incandescent light bulbs to LED letters

Advertising messages are in use around the clock. It is therefore hardly surprising that their illumination has become increasingly energy-efficient. However, this development also presents an increasing number of new challenges for the material being used.

The world has virtually been waiting for some inventions, one of them undoubtedly being the incandescent light bulb. Since Thomas Alva Edison applied for a patent for his design in 1880, the incandescent light bulb has revolutionized the lighting of living spaces and streets – and also advertising.