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12: A Bright Future? Challenges and Opportunities for LED Lighting

Breakout / Working Group
english language

The awareness of the toxic content of fluorescent tubes as well as the EU ban on incandescent light sources have drawn wide-scale public attention to the issue of lighting. Rapid advancements in Solid-State Lighting have revolutionised modern lighting, opening up new market opportunities. Further investigation is necessary into the effects of lighting on humans and their well-being, modern architecture, and also into undesirable impacts such as light pollution. The awarding of the Nobel Prize of Physics in 2014 for the invention of the blue LED confirms the current impact of this form of lighting.


Professor, Materials Department, and Co-Director, Solid-State Lighting Center, University of California, Santa Barbara, CA Abstract
Novel semiconductor materials (based on InGaN) have also been used to fabricate blue LEDs and Laser diodes (LDs), which has lead to the realization of many applications such as LED TV displays, Laser based automotive headlights, and now affords high-efficiency white solid-state lighting. Next generation LEDs using novel structures (GaN layers on GaN substrates) grown by specific deposition methods (metal-organic chemical vapor deposition, MOCVD) have shown remarkable external quantum efficiencies greater than 80%. These novel violet LEDs have been combined with three types of phosphors to produce light of exceptional spectral range and quality (Color Rendering Index CRI=95). Even brighter white light sources have been achieved using a novel combination of semiconductor laser diodes and Garnet crystals (YAG:Ce). Laser diode based white light structures now exhibit luminous efficacy greater than 83 lm/Watt. We believe that solid-state laser lighting has the potential to achieve 85% energy efficiency, corresponding to white light luminous efficacy of 255 lm/Watt, which would lead to revolutionary new compact white lighting sources. This work supported in part by the Solid State Lighting and Energy Electronics Center (SSLEEC).
Lighting Designer and Cameraman, Vienna Abstract
The movie BULB FICTION hit the cinemas in 2011. Today it still sparks the interest of people who want to know more about the background of the ban of the bulb that withdrew the options of free choice of a suitable lighting technology from the European customers. The schedule of the ban currently enters its last phase and would have foreseen the ban of class C halogen sources by September 2016. However, this deadline was postponed recently - does the EC finally pedal back?
After bridging a short intermezzo with compact fluorescent tubes along with all the mercury and recycling problems our bright future will be lit by LEDs - this has both positive and negative aspects.
The high fraction of blue light and the lack of deep red and infrared in most commercial retrofit LED bulbs will continue to stress our eyes. Incandescent lamps could be a cheap and healthy remedy in the evening for our tired eyes, and at least therefore the ban of the bulb should be reconsidered.
Head of Research, Bartenbach GmbH, Aldrans Abstract
Lighting technology is in a time of groundbreaking changes that can symbolically be described by two milestones: the progression of the LED from a weakly glowing signal lamp to a highly efficient point light source, and the the discovery of the so called „third receptor“ in the human eye.
LEDs as a high efficient, digital light source offer new technical possibilities for fulfilling special visual, biological and emotional requirements. But how can we exploit these new possibilities really for the benefit of the people, thus creating a sustainable social development rather than needless technology driven gimmicks ?
An overview about LED lighting applications will be given, advantages and and risks will be discussed, and future scenarios presented.
General Manager, LUMITECH Produktion und Entwicklung GmbH, Jennersdorf Abstract
Light significantly influences the well-being of human beings, characterises the individual day and night time rhythm and affects the activity and the ability to concentrate and relax. However, even if this effect is long known the research on the important health-promoting effect of light is rather new and therefore yet not comprehensive "Human Centric Lighting" is the generic term for one of the most promising and highgrowth-rate segments in the lighting branch. A joint study of Lighting Europe, the German Electrical and Electronic Manufacturers’ Association (ZVEI) and A.T. Kearney expects an outstanding growth trajectory for the „Human Centric Lighting“ market. Up to now this has been a quite minor topic from the customers, industry and policy makers side. Its growth is fueled and triggered by the technology transition from conventional light sources to modern multi-performance LED modules. While the high energy efficiency and long durability of LED modules is widely known in the market, little attention has been paid to their advanced light controllability and their potentially excellent light quality.
In the past few years systems have been developed and continuously optimized, along with the advances of LEDs and the specific and proprietary PI-LED technology. The development of the PI-LED technology represents a milestone on the way to biorhythmic lighting. In the proposed talk, we give an overview on the current state of the technology that drives biorhythmic light for „Human Centric Lighting“, and report about specific practical experiences.
Physician; Researcher; CEO, Medical Light Consulting Abstract
Contemporary artificial light sources such as LEDs offer low energy consumption, extended life cycles and optimal integration into digital light control systems. On the other hand, LED for general lighting purposes exhibit a spectral energy distribution and other properties which are far apart from natural light sources and lighting conditions. The dissection of the full spectrum found in non-thermal light sources may turn out to be problematic with regard to the coordinated light sensing via ocular, dermal end cellular light perception pathways in humans. Possible endocrine, visual and chronobiological effects of non-thermal light sources are discussed and proposals for spectral properties of bio-compatible light sources are provided.
Lighting Architect and Researcher, Designs4People, Gdansk and Zurich; Lecturer, Architectural Lighting Design, Hochschule Wismar Abstract
Today our cities are being used 24/7 and are flooded with artificial lighting. Consequently, NASA outer space photographs show that there are not many dark areas left on the earth’s surface, which has an enormous impact on the visibility of the night sky. Littering of this type has a destructive impact on fauna and flora, which have naturally adjusted to life during nighttime; it can also have adverse effects on human health. This lecture is going to look into the causes of light pollution, its impact and how it can be mitigated based on good and bad examples of realised lighting projects in Europe and Asia. It also reveals that, despite the limitations such as the effect of light pollution on human health and ecosystem integrity noted in studies into the impact of artificial illumination on urban and natural environments, electric lighting can be designed in such a way that its negative consequences for the night-time environment can be reduced.
Director, MATERIALS - Institute for Surface Technologies and Photonics, JOANNEUM RESEARCH Forschungsgesellschaft mbH, Weiz Chair
Innovation Manager, MATERIALS - Institute for Surface Technologies and Photonics, JOANNEUM RESEARCH Forschungsgesellschaft mbH, Weiz Coordination


Professor, Materials Department, and Co-Director, Solid-State Lighting Center, University of California, Santa Barbara, CA

1984 Materials and Metallurgical Engineering, University of Arizona, Tucson, Arizona
1984-1988 Research Assistant, University of Southern California Compound Semiconductor, Laboratory
1986 Materials Science, University of Southern California, Los Angeles, California (Honors)
1988-1991 Research and Development Engineer, Hewlett-Packard Optoelectrics, San Jose, CA
1988 Electrical Engineering, University of Southern California, Los Angeles, California
1991-1994 Assistant Professor, University of California, Santa Barbara, Materials Department
1998-1999 Associate Professor, University of California, Santa Barbara, Materials Department
since 1998 Professor, University of California, Santa Barbara, Materials Department
2002-2007 Executive Director, Solid State Lighting and Display Center
2007 Co-Founder, Soraa Inc.
since 2007 Executive Director, Solid State Lighting and Energy Center


Lighting Designer and Cameraman, Vienna

1974-1979 Hochschule für Musik und Darstellende Kunst, Abt. Film und Fernsehen in Wien, Education in Cinematography
1975-1982 Essistant Cameraman (freelance)
1983-1995 Cinematographer (freelance), focus on documentaries
1995-2001 Cinematographer (freelance), focus on TV-movies and -series
2007 Education in Lighting Design, Bartenbach Academy, Aldrans
since 2008 Lighting Designer (freelance)

Mag.rer.nat Wilfried POHL

Head of Research, Bartenbach GmbH, Aldrans

 Studied mathematics and physics
1985 started at Bartenbach GmbH
  visual perception and light and health
 Leader of various international planning and R&D-projects in these fields, lecturer at different universities.
since 1998 Member of Managing Board and Director Research, dealing with R&D for day- and artificial lighting, including

DI Dr. Stefan TASCH

General Manager, LUMITECH Produktion und Entwicklung GmbH, Jennersdorf

1997 PhD in Physics from University of Technology in Graz (including Scientific Work at the Case Western Research University in Cleveland, University in Potsdam and UCSB in Santa Barbara)
1997-2000 Co-Founder and Managing Director, Lumitech Produktion und Entwicklung GmbH
2001-2010 Co-Founder and Managing Director, Tridonic Jennersdorf GmbH (JV Lumitech and Tridonic)
2005-2010 Co-Founder and President, Lexedis Lighting GmbH (JV Zumtobel and Toyoda Gosei)
since 2010 CEO Lumitech Holding GmbH and Managing Director Lumitech Produktion und Entwicklung GmbH

Alexander WUNSCH

Physician; Researcher; CEO, Medical Light Consulting

1982-1989 Studies human medicine in Kiel, Giessen and Heidelberg, Germany
since 1988 Development and patenting of medical devices for biophysical stimulation
since 1995 Development of detection devices for electromagnetic radiation
1998 Full physician (Licence to practice medicine, Regional Counsil Stuttgart, Germany)
since 1999 Settled in private medical practice in Heidelberg, Germany
since 2003 Development of light modulation meters for flicker detection
since 2008 Associate lecturer for "Light & Health" at Wismar University of Applied Sciences
since 2010 CEO, Medical Light Consulting.

Dr. Eng. Arch. Karolina M. ZIELINSKA-DABKOWSKA

Lighting Architect and Researcher, Designs4People, Gdansk and Zurich; Lecturer, Architectural Lighting Design, Hochschule Wismar

2004-2005 Fisher Marantz Stone Partners, New York/USA, Junior Lighting Designer
2005-2007 Speirs and Major Lighting Architects, London/UK, Senior Designer / Project Manager
2008-2012 Light Bureau Limited, London/UK, Associate / Team Leader
since 2012 Designs-4-People [d4p], Gdansk/PL, Principal Lighting Designer / Founder
2013 Reflexion AG, Zürich/CH, Senior Lighting Designer / Team Leader
2014-2015 Lecturer, Hochschule Wismar, University of Technology, Business and Design Wismar/D Faculty of Architecture and Design, Architectural Lighting Design

Dipl.-Ing. Dr. Paul HARTMANN

Director, MATERIALS - Institute for Surface Technologies and Photonics, JOANNEUM RESEARCH Forschungsgesellschaft mbH, Weiz

1985-1991 Master in Technical Physics at Technical University Graz, Austria
1991-1995 Ph.D. at University of Graz, Institute of Experimental Physics and AVL List Medical Instruments
1994-2000 R&D-Scientist at AVL List Medical Instruments, Graz, Austria
2000-2005 R&D-Scientist and Product Development Manager at Roche Diagnostics, Graz, Austria
2005-2008 Head of R&D, Tridonic Optoelectronics, Jennersdorf, Austria
2008-2010 Head of Research and Technology, Zumtobel LED Division and Ledon Lighting Jennersdorf, Austria

Technology Symposium

show timetable


10:00 - 12:30Technology BrunchSocial
13:00 - 13:10Opening of the Alpbach Technology Symposium 2015Plenary
13:10 - 14:00RTI Policy TalkPlenary
14:00 - 15:30Living with the Machine in the FuturePlenary
16:00 - 17:30Cyber Physical SystemsPlenary
19:45 - 21:15Regional Debate Central Eastern EuropePlenary
21:15 - 23:30Career LoungeSocial
21:15 - 23:30Evening ReceptionSocial


09:00 - 10:30BioeconomyPlenary
09:00 - 18:00Junior Alpbach - Science and Technology for Young PeopleBreakout
09:00 - 15:00Ö1 Children's University Alpbach - Science and Technology for KidsBreakout
10:50 - 12:15Complexity SciencePlenary
12:15 - 13:00Lunch Snacks for the Participants of the Breakout SessionSocial
13:00 - 18:00Breakout Session 01: 2015: The End of Energy RevolutionBreakout
13:00 - 18:00Breakout Session 02: Bio-Economy in Action: National Bio-Economy Strategies in ComparisonBreakout
13:00 - 18:00Breakout Session 03: Human Enhancement Technologies: Amplifying or Reducing InequalityBreakout
13:00 - 18:00Breakout Session 04: Research Promotion at the Interfaces of Risk, Creativity and MainstreamBreakout
13:00 - 18:00Breakout Session 05: Market Upheavals: Challenges and Opportunities for Innovation?Breakout
13:00 - 18:00Breakout Session 06: Entrepreneurship: What Can Science Contribute?Breakout
13:00 - 18:00Breakout Session 07: Games of InEqualityBreakout
13:00 - 18:00Breakout Session 08: Physical Internet: A Seismic Shift for Logistics and MobilityBreakout
13:00 - 18:00Breakout Session 09: Dynamics by Heterogeneity: How Economy and Research Profit from DiversityBreakout
13:00 - 18:00Breakout Session 10: Energy Transition: Same Goal - Different WaysBreakout
13:00 - 18:00Breakout Session 11: Hydrogen and Fuel Cells: A Market Breakthrough Ahead?Breakout
13:00 - 18:00Breakout Session 12: A Bright Future? Challenges and Opportunities for LED LightingBreakout
13:00 - 18:00Breakout Session 13: Truth and Reality: The Importance of Models in Economy, Science and PhilosophyBreakout
13:00 - 18:00Breakout Session 14: Virtual Learning: InEquality in Education?Breakout
20:00 - 21:30Urban Innovators Challenge - Start Up Your CompanyPartner


09:00 - 10:30MIT and its Media Lab, Special Guest at this Year's Technology SymposiumPlenary
10:30 - 11:30InEquality: The New Silk RoadPlenary
11:50 - 13:15Art, Design and Architecture as a Laboratory of Digital ModernityPlenary
13:15 - 13:30Closing Statement of the Alpbach Technology SymposiumPlenary
13:30 - 14:00Snack ReceptionSocial