www.led-professional.com ISSN 1993-890X Review LpR The Global Information Hub for Lighting Technologies May/June 2018 | Issue 67 Tech-Talks Bregenz: Ken Munro Research: Thermal Testing, Production Manufacturing & Technology: Micro-Plants & IoT Application: Aerospace Exterior Lights www.NICHIA.com FLS_Nichia_CoverCorner_LED Pro.indd 1 2017-04-25 3:37 PM Innovation in Light Be Empowered by Trends in Lighting. What is your inspiration? TiL is the unique, international “Innovation in Light” event, and is dedicated to bridging the gap between technologies and applications. Whether you are an architectural lighting designer, architect, industrial designer, healthcare innovator, advertising agency, automotive strategist, mobility designer, agriculture innovator, entertainment professional, education facility manager, project developer, urbanist, car designer, or investment consultants. TiL will reinvigorate your thinking about light in your industry. You will learn from the most compelling innovators, inventors and industry leaders. Creating Value with Light. TiL is all about sharing talent and passion. Curated by We look forward to meeting you at TiL 2018! ROGIER VAN DER HEIDE Master in Light 2nd International TiL Event September 25–27, 20 1 8, Opera House Bregenz www.TiL2018.com CATEGORYEDITORIAL 4 L+B 2018 - Connectivity & Services At L+B 2018, the focus was on the topic of CONNECTIVITY with all kinds of forms and applications for many providers. In addition, it became apparent that more and more service providers were entering the market with concrete SERVICE solution packages. In the context of connectivity, we had an interesting conversation about current trends with Patrick Durand, Worldwide Technical Director, and Francois Mirand, Technical Director EMEA, from Future Lighting Solutions, which I would like to share with our readers. The high complexity of connected systems can pose a major challenge in projects. For this reason it is extremely important that connected lighting be based on two basic principles: Firstly, we need standards that are as widespread as possible. Secondly, the experts suggested that we need systems that are scalable and interoperable. We agree with this opinion and see standardization as a key success factor for the market acceptance of smart systems. Service solutions are the second most important key for the implementation and application of modern lighting solutions. But which services are really required? Here we certainly have to look at the entire value chain. From the assistance of distributors, such as the engineering tools from Future Lighting Solutions, to configurators of luminaires, such as the new Unico from XAL, to leasing models on sale – services; they all make a significant difference and form a unit together with standardized solutions. The L+B 2018 showed the boundless directions the world of light is taking. Connectivity and services are the dominant topics facing the lighting industry on a broad scale. Of course, quality and safety play an important role. Particular mention should be made here of the new EU directives as was also well documented in the LightingEurope Forum. The world of light has opened up and has become enormously diverse and creative. However, the focus of all efforts is always to provide the right light for the respective application. Optimum lighting quality stays the primary goal above all else. We hope you enjoy this issue of LpR. Please let us know how you experienced Light +Building 2018. Yours Sincerely, Siegfried Luger Publisher, LED professional © 2018 Luger Research e.U. | Issue 67 CONTENT OVERVIEW 6 COMMENTARY REGULARS Blue Light Hazard - How Dangerous is SSL Lighting? 04 EDITORIAL 08 by Dr. Thomas Attenberger, Instrument Systems 08 COMMENTARY 10 COMPONENTS NEWS TECH-TALKS BREGENZ 26 APPLICATIONS NEWS Ken Munro, Partner & Founder, Pen Test Partners 28 RESEARCH NEWS 36 compiled by Dr. Guenther Sejkora, LED professional 32 REGULATION NEWS 34 CIE RESEARCH RESEARCH Automatic Panel Level Transient Thermal Tester 44 98 ABOUT | IMPRINT by Prof. Gordon Elger et al., Technische Hochschule Ingolstadt Roll-to-Roll UV Nanoimprint Lithography for Large-Area Nano- and 50 Micro-Structuring of Flexible Substrates by Dr. Paul Hartmann et al., Joanneum Research Forschungsgesellschaft m.b.H A New Approach for Manufacturing LED Advertising Boards Backlighting 56 by Dr. Eveliina Juntunent al., VTT Technical Research Centre of Finland EVENTS Lighting Industry Quo Vadis - Impressions from Light + Building 2018 HIGHLIGHTS 62 by Arno Grabher-Meyer, LED professional Roll-to-Roll UV Nanoimprint Lithography 50 for Large-Area Nano- and MANUFACTURING Micro-Structuring of Flexible Substrates A Manufacturing Revolution for the LED Lighting Industry by Dr. Paul Hartmann et al., 76 by Paavo Käkelä, EID Tech Joanneum Research Forschungsgesellschaft m.b.H TECHNOLOGIES Integrating Lighting in the Internet of Things 80 by B. Pronk & F. van Tuijl, Philips Lighting Research & Philips Lighting LED Lighting Requires New Approaches in Optics 88 by Marek Škereň, IQ Structures AERONAUTICS Abrasion in Transparent Lens Materials for Exterior Aircraft Lighting 92 by Adam Willsey, Kopp Glass ADVERTISING INDEX FUTURE LIGHTING SOLUTIONS 1 GL OPTIC 19 LED LIGHT FOR YOU 61 LUMILEDS 2 LABSPHERE 19 LIFUD TECHNOLOGY 79 TIL 3 OSRAM 25 CREE 83 EVONIK 5 EDISON 29 GUANGZHOU INT. LIGHTING EXHIBITION 87 FUTURE LIGHTING SOLUTIONS 7 INSTRUMENT SYSTEMS 31 CREE 91 LPS 9 FLS-LUMILEDS 33 EPISTAR 97 WAGO 11 FLS-NICHIA 43 LPR 99 FULHAM 15 INSTRUMENT SYSTEMS 49 WÜRTH 100 Issue 67 | © 2018 Luger Research e.U. COMMENTARY EYE SAFETY MEASUREMENT 8 BLUE LIGHT HAZARD - HOW DANGEROUS IS SSL LIGHTING? Modern Solid State Lighting (SSL) assessment of the risk classes of light technology has long since found its sources. Additionally, IEC/TR 62778 way into our normal working and living explains how to apply IEC 62741 for environments. In the early phases, simpler assessment of the BLH for consumers were most concerned with lamps and luminaires. lifetime, pricing and light quality of the new LED-based light sources. Now they have Accurate risk assessment is a challenging become almost ubiquitous, a focus has task for the experimenter, and starts with been placed on safety. At the recent the selection of the correct test equipment. Light+Building exhibition topics such Today’s measurement instrument of as photobiological safety and blue light choice is often an array spectrometer hazard (BLH) were highly ranked among instead of the hard-to-handle double Dr. Thomas Attenberger both visitors and exhibitors. monochromator suggested by the Thomas Attenberger received standard. But even high-end array Photobiological safety is nothing exclusive spectrometers must offer advanced stray his PhD in Physics from the to SSL sources, but must be evaluated for light correction methods to achieve the University of Regensburg in all light sources. Due to their similarity to required high dynamic measuring range, 1992 for his work in the laser diodes, LEDs were originally covered especially in the less sensitive blue region. by the laser safety standard IEC 60825, Carefully designed test adapters are field of high-resolution which often led to an overestimation of the necessary to ensure correct and spectroscopy with a thesis risks. Since 2009 LEDs and SSL sources reproducible test geometries. With such on “Persistent spectral hole have therefore been subject to IEC 62471 equipment, testing labs - which should be “Photobiological safety of lamps and lamp accredited to ISO17025 - can reliably burning”. He worked for systems”. All lamp and luminaires brought assess the risk class of lighting products. several years as R&D project onto the market must be classified leader at a Munich high tech according to this standard. Several studies have evaluated the risk classes of various kinds of SSL sources, company, where one of his The standard identifies two health lamps and luminaires. In general, tasks was to establish a hazards that can be caused by visible SSL sources were not found to pose a spectroscopy lab for light. Intense light may lead to retinal greater risk to the user than conventional burns, a hazard that is easily avoided sources. Most luminaires with non-directly performing basic research for by normal aversive behavior. However, visible LEDs were assigned to risk class 0. optical sensor development. blue light between 400 nm and 500 nm Only luminaires with directly visible LEDs Attenberger joined Instrument may cause photochemical damage to the ended up in risk class 1 or, in some cases, retina, a hazard that is difficult to assess in class 2, which the standard still Systems GmbH in 2001 as by users. This so-called blue light hazard classifies as free of risk under normal sales and product manager may lead to degeneration of the macula. use and aversion reaction - just like for LED test and measurement The corresponding weighting function conventional sources. ranges from 300 nm to 700 nm with a equipment. Since 2009 he maximum at 437 nm. In view of the I must emphasize that these positive has held the position of Vice distinctive blue peak of white LEDs, results should not encourage President Sales at Instrument the question arises as to whether SSL manufacturers to underestimate the sources are hazardous. importance of safety assessment of Systems GmbH, in which he light sources. Research on the safety is responsible for worldwide Depending on the radiance levels, aspects of lighting will continue, and only sales and marketing activities. BLH sensitivity and exposure times, accredited labs using state-of-the-art test IEC 62471 divides light sources into four equipment will be able to ensure a reliable This position brings him into risk groups ranging from 0 (no risk) to risk assessment. Consumers may close contact with other major 3 (always dangerous). Risk groups 1 and 2 rightfully expect lamps and luminaires players in the LED and SSL are sources that are not dangerous under providing light that is safe in every aspect. normal behavior and aversion reactions. Otherwise, SSL lighting will not be able lighting industry.