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Cluster Report Photonics in the Capital Region Berlin-Brandenburg

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  • Photonics
  • Berlin
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  • Optics
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24 Cluster Report Optics and Photonics – Research & Industry | Lighting Technology 2.2 Lighting Technology – a Changing Industry “In the last ten years, there has been a revolution in lighting due to the change in technology from gas discharge lamps to semiconductor light sources. A particular strength of the local manufacturers are the high quality and design of their products.” Prof. Dr.-Ing. Stephan Völker | Spokesperson Focus Area Lighting Technology, TU Berlin Berlin Brandenburg have a long tradition in lighting technology: both the essential scientific foundations and key product lines were developed here. To this day, not only light generation, but also photometry, lighting technology, and the metrological fundamentals for light measurement have been driven forward by local institutes and companies. Overall, lighting technology in Germany is an industry of the future promising dynamic growth and a considerable export share. There are also close links to building technology, lighting of public spaces, environmental technology and energy efficiency, using solar power, and various health aspects. past decade have been semiconductor-based light sources. LEDs (light-emitting diodes) not only have an excellent energy efficiency and performance. They can also be controlled electronically and enable the design of novel, intelligent lighting systems. The importance of lighting technology today is evident from the sales figures: the German lighting industry has recorded steady growth over the past few years and in 2016 achieved a total turnover of almost 7 billion euros (statista.com). However, due to increasing automation and a global shift in production, the number of employees in the industry across Germany has declined slightly over the years. About 70 Berlin Brandenburg companies are active in lighting technology. This makes lighting one of the most important drivers of the region’s economy, a position that must be maintained and expanded in the future. The key innovation in the field of lighting technology in the Bebelplatz, Berlin © Festival of Lights International Productions GmbH/Nelofee Measuring site for LEDs © Epigap Optronic GmbH OLEDs, light sources based on organic semiconductors, play an increasingly important role. These organic light-emitting diodes are thin-film components and can be produced more cost-effectively than normal LEDs, but, for now, their lifespan is currently shorter. Since they do not require monocrystalline materials, however, they can also be used in flexible screens or as electronic paper. Lighting technology has also taken on a cultural and artistic significance for the German capital. This can be experienced directly at the city’s lighting festivals each October: “Berlin leuchtet” and the “Festival of Lights”, when lighting artists spectacularly stage many of the city’s buildings with exceptional light shows and projections. The events attract large

Cluster Report Optics and Photonics – Lighting Technology 25 crowds who come out to enjoy seeing the city and its historical landmarks in a whole new light. www.berlinleuchtet.com/english/ www.festival-of-lights.de/en Research, Measurement, Testing The future looks bright for the Berlin Brandenburg region thanks not least to the Chair of Lighting Technology at TU Berlin, which is training the next generation of innovators for the numerous regional companies in the sector. Lighting technology has been taught at TU Berlin for well over a century. With his inaugural lecture on “electrical light and lighting systems” in the winter semester of 1882/83, Prof. Hermann Wilhelm Vogel held the world’s first chair in lighting technology. The research now focuses on new concepts for exterior and interior lighting as well as daylighting. It is also investigating such physiological questions as the non-visual effects of light and the possibilities of vertical farming. The LED runway enables the testing and investigation of various urban lighting scenarios. © TU Berlin The most important research and demonstration instrument is the LED runway, which the Chair of Lighting Technology at TU Berlin built together with the German Museum of Technology Berlin and the Berliner Immobilienmanagement GmbH. Industry participates by providing a wide variety of luminaires and lighting control systems. Over a total length of 1,500 m (almost a mile), numerous LED light points were installed on several test tracks on the grounds of the German Museum of Technology. The targeted control of the light sources is used to demonstrate and investigate the importance of light quality, road safety, energy efficiency, and their dependence on mast height, mast spacing, buildings, light distribution, and light colour. This is groundbreaking work for the future of urban lighting and not just in Berlin. www.li.tu-berlin.de/menue/home/parameter/en www.led-laufsteg.de Entrance to the TU Berlin, Chair of Lighting Technology © TU Berlin Both theoretical and applied research take place in the field of lighting technology in cooperation with numerous companies and institutions both within and outside Germany. Given the transition of urban lighting to new light sources and the growing issue of light pollution, research on the development of intelligent lighting concepts for public areas is also underway. The aspects of colour temperature, glare, and the photobiological effect of light sources are also becoming increasingly important. In this context, the TU Berlin’s Lighting Technology chair also conducts testing for external customers. This includes the measurement and evaluation of general lighting as well as the characterisation of special lighting or radiation solutions using standard-compliant measurement methods. The Chair of Lighting Technology at TU Berlin is also a partner of the Professional Lighting Design Convention, the leading conference on lighting design in architecture. www.pld-c.com

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