Resources | LpR Article | Electronics | Smart Lighting & IoT | Drivers | Controls | Smart Lighting &amp | IoT | amp | Aug 03, 2020

A New LED Controller Technology to Expedite the Next Level of Smart Lighting

A New LED Controller Technology to Expedite the Next Level of Smart Lighting Lighting installations that use artificial lighting and often deemed more comfortable and energy efficient are generally referred to as "Smart Lighting". While no clear definition exists "Smart Lighting" has become a common catch phrase. Kurt Marquardt, Senior Director LED Lighting Systems and Product Marketing, Infineon Technologies has a more accurate definition. For him, the term "smart lighting" describes the capability of the lighting system to adapt automatically to the needs of the users and the room. He presents an alternative way to implement smart lighting systems, using the new XDPL8221 digital LED-driver IC [1]. Read more »

LpR Article | Research | Health + Environment | Environment | Jul 30, 2020

The Adverse Ecological Impacts of Light Pollution: LEDs' Role in Mitigation

The Adverse Ecological Impacts of Light Pollution: LEDs' Role in Mitigation With the negative effects of artificial light at night on ecosystems increasingly well-understood, attention is now turning to the ways in which these impacts can be mitigated through uptake of novel technology and lighting strategies. Dr. Callum J. Macgregor, post-doctoral research associate at the Department of Biology of the University of York, and Dr. Darren M. Evans from the School of Natural and Environmental Sciences of the Newcastle University, discuss the current evidence for costs and opportunities associated with uptake of LED lighting and highlight important directions for future investigation. Read more »

Resources | LpR Article | Research | Thermal Management | Measurement | Jul 29, 2020

Temperature Profiling of Secondary LED Optics by Infrared Thermography

Temperature Profiling of Secondary LED Optics by Infrared Thermography Over the last few years, the power density of white LEDs has increased dramatically. Whilst there are large efforts to optimize the thermal management and thus the temperature stability of the LEDs, less attention is paid to the temperature of the secondary optic. Peter W. Nolte, Franziska Steudel, Bernd Ahrens, Nils J. Ziegeler, Frank Drees, Horst Rudolph, and Stefan Schweizer from the Fraunhofer Application Center for Inorganic Phosphors, the South Westphalia University of Applied Sciences, and the Innovations-and Technologycenter GmbH, TRILUX Group respectively, have approached this issue. They investigated the temperature profiles of polymethyl methacrylate (PMMA) and polycarbonate (PC) secondary optics and they discuss the results. Read more »

Resources | LpR Article | Research | Environment | Sustainability | Jul 24, 2020

On Life Cycle Assessment to Quantify the Environmental Impact of Lighting Products

On Life Cycle Assessment to Quantify the Environmental Impact of Lighting Products The lighting industry has made great efforts to increase energy efficiency around the world with a strong participation from governmental organizations, multilateral organizations and agencies. However, energy consumption is not the only aspect that needs to be considered for transforming the lighting industry. Víctor Ferreira, Deidre Wolff, and Cristina Corchero from Catalonia Institute for Energy Research (IREC) will explore relevant environmental metrics to help inform the reader about circular economy and Industry 4.0 strategies to achieve a sustainable lighting product. Read more »

Resources | Tech-Talks Bregenz | Lighting Design | Health + Environment | Quality | May 11, 2020

Tech-Talks BREGENZ - Prof. Ruairí O'Brien, Founder of Ruairí O'Brien Lighting Design

Tech-Talks BREGENZ - Prof. Ruairí O'Brien, Founder of Ruairí O'Brien Lighting Design Ruairí O'Brien, associate professor and head of the Architecture and Visual design department at the German University in Cairo and CEO of Ruairí O'Brien. Architektur. Licht Raumkunst, surprised and delighted the audience with his lecture at LpS 2016 when he talked about allowing darkness. He expressed the same sentiments in a caption for a figure in the proceedings booklet: "The future in Dresden is not lighting excess - the future is Re-Darkness with intelligent SSL concepts." This year, Ruairí held two lectures at TiL in which he emphasized how important a thorough application of light is in respect to culture, ethics, and environment. In addition to his work, these interesting statements made it made a Tech-Talk Bregenz with him a top priority. Read more »

Resources | Commentary | Smart Lighting + IoT | Health + Wellbeing | May 07, 2020

Personal Lighting Profiles Might Be the Key to Creating a Natural "Work Light Balance"

Personal Lighting Profiles Might Be the Key to Creating a Natural "Work Light Balance" Commentary from LpR 76: Henrik Clausen has been involved in lighting for over 30 years in both commercial and academic positions. In 1996, he became the Managing Director of Fagerhult Lighting in Denmark, and held that position until 2004, when he founded the Fagerhult Lighting Academy. In 2015 he also became Head of Research for Fagerhult. He holds a position as professor in Lighting Design at AAU in Copenhagen. He guest lectures at various Universities around the world. He speaks worldwide, primarily addressing the human and emotional aspects of light and lighting design. Read more »

Resources | Commentary | Health + Environment | Quality | May 04, 2020

Providing Better Light Should Still be the Focus of the SSL Industry

Providing Better Light Should Still be the Focus of the SSL Industry Commentary from LpR 75: As President of Bardsley Consulting, Norman advises industry, government and academia on solid-state lighting, flat panel displays and energy efficiency, with special emphasis on diffuse lighting and organic electronics. He is a member of the Technical Advisory Team for the Solid-State Lighting Program of the US Department of Energy. Dr. Bardsley also acts as Chief Analyst for the International Solid-State Lighting Alliance (ISA) and is a member of the UNEP Expert Task Force on LED Lighting and Controls. Read more »

Resources | Tech-Talks Bregenz | Wilfried Kramb | Lighting Design | May 04, 2020

Tech-Talks BREGENZ - Wilfried Kramb, Interior & Lighting Designer, a∙g Licht

Tech-Talks BREGENZ - Wilfried Kramb, Interior & Lighting Designer, a∙g Licht TTB from LpR 75: The value of lighting design and light planning has always been underestimated, despite it becoming more important with the rise of Solid-State-Lighting. This is a fact that the public doesn't realize, even though the industry does. Digitalization, compared with the special properties of LED lighting and the aim of the lighting industry to establish their IoT hubs, is a new challenge. This is even more apparent when trying to integrate light sources directly in building structures. Responsibilities and tasks are no longer clearly separated between the different disciplines of architect, lighting designer, IT planner and electro planner. Guenther Sejkora and Arno Grabher-Meyer talked with Wilfried Kramb, owner and CEO of a·g Licht, about these tendencies and topic. Read more »

Resources | Commentary | UV | Disinfection | Feb 12, 2020

Selecting the UV LED Wavelength for Purification Applications

Selecting the UV LED Wavelength for Purification Applications Patrick Durand is the Worldwide Technical Director at Future Lighting Solutions (FLS) with over 15 years of experience in the solid state lighting industry. Patrick leads the FLS Technical Marketing teams and FLS laboratory teams located in multiple regions around the world with the objective of providing world-class support to lighting OEMs in developing luminaires with the latest SSL technology from the light source to the complete system incorporating the LED driver, optic, thermal management and intelligent control solutions. Read more »

Resources | LpR Article | Drivers | Automation | Special Applications | Feb 10, 2020

LED Driver for High Power Machine Vision Flash

LED Driver for High Power Machine Vision Flash Automation is nothing new and its demands are rapidly increasing, either in production or inspection. More sensors are used and many are based on direct or reflected light detection. Some work in the visible range and others work in the non-visible spectrum of light. LED lighting has become the standard in most applications as the solid-state light source offers numerous advantages over other lighting technologies. However, the LED lighting system is only as good as the peripheral components and LED drivers are one key element in many applications. Keith Szolusha, LED driver applications manager and Kyle Lawrence, associate applications engineer, identified the challenges for machine vision flash applications and propose a solution example with Analog Devices' LT3932 high speed LED driver. Read more »

Resources | LpR Article | Technologies | UV | Horticulture | Feb 10, 2020

Transparent Material Considerations for UV Optics in Horticultural Lighting Applications

Transparent Material Considerations for UV Optics in Horticultural Lighting Applications Advancements in UV LED technology have begun changing the horticultural lighting landscape. Research is still ongoing to discover the extent of benefits and best practices of using UV light in horticulture. Using optics in tandem with UV LED light systems can help reach performance goals and optimize growing. Although there are several UV- transmitting materials available, not all are equivalent or able to meet the requirements for UV applications. Justine Galbraith, glass engineer, and Sharayah Follett, market development manager at Kopp Glass, Inc. discuss the performance considerations of various UV-transmitting materials and how application challenges are addressed by integrating optical elements. Read more »

Resources | LpR Article | Research | LEDs | Manufacturing | Feb 05, 2020

Hermetic Polymer-Free White LEDs for Harsh Environments

Hermetic Polymer-Free White LEDs for Harsh Environments AlGaInN-based white LED can easily achieve lifetimes of up to 100,000 h depending on junction temperature and current density. However, state of the art silicone encapsulated LEDs with powder-based phosphors reveal a strong dependence of field lifetimes on environmental conditions such as humidity, corrosive gas and air pollutant exposure. Dr. Michael Kunzer, Group Leader LED Modules at Fraunhofer Institute for Applied Solid State Physics and his colleagues, Ralf Schmidt, Andreas Zibold, Vasileios Georgiou-Sarlikiotis, Michael Arnold and Isabel Kinski propose luminescent ceramics as an interesting alternative to polymer-dispersed phosphors. This provides entirely new opportunities for the manufacturing of white LEDs. The authors explain the properties and advantage of this hermetic, light converting cap material and how to completely avoid polymers. Read more »

Resources | LpR Article | Research | Thermal Management | Testing | Measurement | Feb 05, 2020

A New Approach for Fast and Accurate Measurement of Light Emitting Diodes Junction Temperatures

A New Approach for Fast and Accurate Measurement of Light Emitting Diodes Junction Temperatures LpR 73 Article, page 48: Junction temperature of LEDs is one crucial parameter to being thoroughly observed. In this paper, Ahmet Mete Muslu, Onuralp Isil and Prof. Mehmet Arik from the Energy Efficient Electronics and Lighting Technologies Center (EVATEG), Department of Mechanical Engineering at the College of Engineering Ozyegin Universitywill at first describe the importance of Tj for LED systems including RGB and white LEDs. Then they will present techniques from literature and recently in-house developed novel methods and a new Junction Temperature Measurement Device (EVAtherm). Results in selected general lighting and automotive lighting applications will be demonstrated. Read more »

Environment | Commentary | Resources | Health + Environment | Dec 16, 2019

Care, Caution & Awareness Are Needed When Using LED Lights

Care, Caution & Awareness Are Needed When Using LED Lights Kyra Xavia is a researcher, educator and investigative journalist based in New Zealand. Her roles as general secretary of the Light and Lighting Research Consortium (LLRC), delegate for the International Dark Sky Association (IDA), New Zealand Ambassador for Women in Lighting 2019, and co-leader of the Dunedin Dark Skies Group, involve educating decision-makers and the public about the importance of responsible lighting, nocturnal placemaking and the value of darkness. Recognised in New Zealand and abroad for her advocacy in these matters, Kyra has co-authored research papers and published articles specific to this subject. Kyra has recently been awarded with The Dark Sky Defender Award. Read more »

Resources | LpR Article | Special Applications | Artificial Intelligence | Dec 16, 2019

AI & Lighting

AI & Lighting LpR 73 Article, page 62: Recently, Artificial Intelligence has emerged as an evolutionary force in almost every industry, demonstrating its potential to radically change existing processes. In common literature, AI is interchangeably used with Machine Learning for which various tools have already become commonplace. Henri Juslén, D.Sc (tech.), Chief Future Illuminator, Omar Nasir, M.Sc (tech.), Data Scientist, and Javad Nouri, M.Sc, Data Scientist at Helvar Oy Ab discuss AI on the context of the lighting industry where the scope of applications of AI is similarly quite broad, impacting the various stages involved in the lighting life-cycle such as design, installation, commissioning and configuration. Read more »

Resources | LpR Article | Special Topics | LiFi | Dec 16, 2019

LiFi as a Paradigm-Shifting 5G Technology

LiFi as a Paradigm-Shifting 5G Technology LpR 73 Articles, page 54: There are many misconceptions about LiFi, a wireless communication technology that uses the infrared and visible light spectrum for high speed data communication. Prof. Harald Haas, Professor of Mobile Communications at the Institute for Digital Communications from the University of Edinburgh, will explain what Light-Fidelity (LiFi) is and argue why it is a 5th Generation (5G) technology. Peak transmission speeds of 8 Gbps from a single light source have been demonstrated, and complete cellular networks based on LiFi have been created. Besides discussing numerous misconceptions, the potential impact this technology can have across a number of existing and emerging industries will be explained as well as new applications that LiFi can unlock in the future. Read more »

Resources | Tech-Talks Bregenz | Laser Technology | Dec 13, 2019

Tech-Talks BREGENZ - Julian Carey, Marketing Manager at SLD Laser

Tech-Talks BREGENZ - Julian Carey, Marketing Manager at SLD Laser In 2016, Nobel Laureate, Professor Shuji Nakamura held a key note speech at LpS. As the founder of Soraa and SLD Laser, he named laser lighting as the next, innovative step and disruption in lighting. He emphasized the need to focus on light quality and the tailoring of LED lighting to the natural needs of humas, providing light that mimics sunlight as closely as possible. It was therefore self-evident that LED professional would invite Julian Carey, the Product and Technical Marketing Manager at SLD Laser, for a Tech-Talk when he was at the LpS 2018 in Bregenz. We asked him for an update on the status of laser lighting, business strategies and future prospects and how laser lighting has developed since Professor Nakamura's statements in 2016. Read more »

Resources | Commentary | Quality | Nov 15, 2019

Commentary: Providing Better Light Should Still be the Focus of the SSL Industry

Commentary: Providing Better Light Should Still be the Focus of the SSL Industry J. Norman Bardsley, PhD - As President of Bardsley Consulting, Norman advises industry, government and academia on solid-state lighting, flat panel displays and energy efficiency, with special emphasis on diffuse lighting and organic electronics. Read more »

Resources | LpR Article | Research | Thermal Management | Sep 23, 2019

Thermal and Optical Challenges for SSL in Automotive Applications

Thermal and Optical Challenges for SSL in Automotive Applications LpR 72 Article, page 50: Solid State Lighting changed the lighting environment in automotive lighting almost more than in the field of general lighting. While efficiency of the devices increased and every few weeks new improvements are reported, thermal management remains crucial and a critical part of the system. Umut Zeynep Uras, Ahmet Mete Muslu and Mehmet Arik, from the Energy Efficient Electronics and Lighting Technologies Center (EVATEG), Department of Mechanical Engineering, College of Engineering at Ozyegin University, and Fatih Goren from the FARBA Corporation, explain the dependencies between photometric, electrical and thermal parameters of an automotive lighting application. Read more »

Resources | Smart Lighting + IoT | Standardization | Controls | Tech-Talks Bregenz | Sep 19, 2019

Tech-Talks BREGENZ - Dr. Scott Wade, Technical & Certification Manager, DiiA

Tech-Talks BREGENZ - Dr. Scott Wade, Technical & Certification Manager, DiiA Dr. Scott Wade has been the Technical & Certification Manager for DALI/DiiA since 2013 and has been an industry expert member of the IEC62386 standardization team for about 14 years. He was invited to hold a lecture at the LpS 2018 about the founding of DiiA for the purpose of taking over the DALI trademark from ZVEI and discussed measures that were taken to further develop the standard and its certification process and make the DALI concept future proof with DALI-2. Read more »

Resources | LpR Article | Technologies | DC-Grids | Sep 18, 2019

LED Lighting Systems in Smart Buildings with DC Microgrids

LED Lighting Systems in Smart Buildings with DC Microgrids LpR 72 Article, page 60: While electric motors for ventilation and air-conditioning systems were already DC-based in the past, powerful IT systems, LED lighting systems, photovoltaic systems with batteries and charging systems for electro mobility are now increasingly being used in modern building environments. They all need direct current (DC). Therefore, an obvious step is to equip modern buildings with DC grids. Carsten Moellers from Abalight discusses a number of unresolved questions and presents possible solutions in this article. Read more »

Resources | LpR Article | Research | Micro-Optics | Aug 13, 2019

Semi-Empirical Characterization of Freeform Microlens Arrays

Semi-Empirical Characterization of Freeform Microlens Arrays LpR 72 Article - page 42: Microlens arrays (MLA) have been used for imaging and non-imaging applications for a long time as cost-effective solutions. Non-symmetrical beam shapes require more advanced non-symmetrical freeform microlens arrays (FMLA). The required FMLA molding tools convey a high cost and an iteration process is required for the final design. Oscar Fernández, Tamara Aderneuer, Rolando Ferrini from the Centre Suisse d'Electronique et de Microtechnique, CSEM, and Julien Duchene from ANSYS proposed a method to overcome these limitations based on 3D surface sampling, computer generation of a ray-traceable model and ray-tracing performance simulation and demonstrate feasibility for several commercially available freeform asymmetric thin-film diffusers. Read more »

Applications | Smart Lighting + IoT | Resources | LpR Article | Aug 13, 2019

Technologies for Shared Office Space

Technologies for Shared Office Space LpR 72 Article, page 66: Shared office spaces are gaining popularity as a flexible, resource-efficient and creativity-inspiring way to work. The dynamic nature of such office spaces requires building automation and lighting control solutions that can quickly be deployed and easily be adapted to new office layouts. Matthias Kassner, Vice President Product Marketing at EnOcean GmbH, takes a look at different connectivity architectures (wired, wireless, hybrid) and protocols (Bluetooth, ZigBee, EnOcean, PoE) to assess their usability and show how minimizing the need for maintenance is a key for increasing profitability of service-based offerings. Read more »

Resources | Commentary | Aug 13, 2019

What the Heck Is Future Proof?

What the Heck Is Future Proof? Commentary from LpR 72: The first time the question about future proofing LED systems came up seriously, was at LightFair 2018 when Siegfried Luger interviewed Patrick Durand. Since then, it has been the buzzword throughout the industry. Discussions concerning future proofing are often limited to wireless communications, IoT and some type of AI. But isn't there more? Read more »

Resources | Human Centric Lighting | Light Generation | Health + Environment | LpR Article | Aug 01, 2019

Circadian-Friendly Light Emitters: From CCT-Tuning to Blue-Free Technology

Circadian-Friendly Light Emitters: From CCT-Tuning to Blue-Free Technology Common levels of blue radiation are sufficient to disrupt the circadian cycle, calling for blue-depleted emitters in the evening. Most current solutions employ low-CCT and suffer from poor light quality. Aurelien David, chief scientist at Soraa explains the melanopic lumen and its possible sources of inaccuracy related to the uncertainty in assessing the circadian action spectrum. In addition, he also discusses the concept of a blue-free emitter with minimal melanopic lumen at very low CCT and how such a spectrum providing a good light quality can be optimized. Read more »

Resources | LpR Article | Research | SciPiL | Medical | Jul 29, 2019

Flex LED Based Smart Light System for Healing of Chronic Wounds

Flex LED Based Smart Light System for Healing of Chronic Wounds LpR 71 Article - page 48: Chronic wounds are notoriously challenging to treat, because they do not follow the typical healing process or time-frame. The resulting burden is significant, affecting over 40 million patients. Blue light is known for its anti-microbial and anti-inflammatory effects in the initial stages of the healing process. David Kallweit, researcher at CSEM, reports about the joint development of a chronic wound treatment device with their MEDILIGHT partners, URGO RID, University of Heidelberg, SignalGenerix, Microsemi, Technical University of Berlin, and Amires. He furthermore shows how it works and discusses future prospects. Read more »

Medical | Tech-Talks Bregenz | Resources | Health + Environment | Jul 29, 2019

Tech-Talks BREGENZ - Dr. Octavio Perez, Adjunctant Researcher, Mt. Sinai Hospital

Tech-Talks BREGENZ - Dr. Octavio Perez, Adjunctant Researcher, Mt. Sinai Hospital Dr. Perez received the LED professional Scientific Award 2018 for his paper on "Light and ED Clinical Wellness and Performance Improvement", which was published in LpR 70. The evaluation jury had the following to say about why they selected his paper: "The paper is based on the clear definition of the research question, hypothesis and objective of the research. The methodology of the screening study is described in detail and both subjective and objective parameters have been measured. Although Emergency Department lighting is a very special application, the paper provides interesting results." This interview provides background information on Octavio Perez, his work in general, his opinion on human centric lighting risks, opportunities and applications and how he became involved in this interesting research topic. Dr. Perez also provides additional details about the presented paper. Read more »

Technologies | Smart Lighting + IoT | Resources | LpR Article | Jul 29, 2019

Voice Controlled Lighting that Protects Privacy and Data

Voice Controlled Lighting that Protects Privacy and Data LpR 71 Article - page 54: Intelligent lighting systems undoubtedly offer high comfort and energy efficiency. But especially conventional voice control systems like Amazon Alexa, Apple Siri or OK Google, with connected lamps and lighting fixtures are also becoming targets for uninvited guests. The benefits and technology of a new approach offering local voice control and artificial intelligence will be explained by Genia Shipova, Director Global Communications at Snips. Read more »

Human Centric Lighting | Health | Resources | Health + Environment | LpR Article | May 27, 2019

Healthy Light - LED Technology for Health and Care Applications

Healthy Light - LED Technology for Health and Care Applications The right light, at any time during the day or night, is absolutely essential for health and well-being especially in health and care applications. Peter Haumer, Head of Technical Sales at Lumitech/Kiteo reveals why, besides full spectrum and high color rendering, mimicking real daylight conditions with extended daylight curves, a direct and an indirect component (CCT 1.800–16.000 K), are essential. The article discusses the benefits that can be derived from special colors for medical staff, patients and residents. Read more »

Resources | Commentary | May 22, 2019

Well-Being, Light and Exhibition Lighting

Well-Being, Light and Exhibition Lighting Commentary from LpR 71: Well-being is the state of feeling healthy and happy, a good or satisfactory condition of existence, including the emotional and psychological sphere. In 1810, Goethe published a theory based on a human-based approach, combining visual appearance with harmony, culture, sensations and psychology. His color wheel was entitled "allegorical, symbolic, mystic use of color" and was composed of six hues, i.e. red (the beautiful), orange (the noble), yellow (the good), green (the useful), blue (the common) and violet (the unnecessary). The position on the wheel was harmonically relevant and in particular the colors in opposite position generated a strong psychological contrast and were called "opposite colors". Primary colors were yellow, blue and red, and the opposites were green, violet and orange, respectively. Goethe's wheel and the particular matching of opposites soon became popular and was used by the Impressionism movement, especially by Vincent van Gogh and Claude Monet. In this artistic movement, the special impact given by the combination of opposite colors were deliberately aimed to create special psychological effects and sensations. Read more »

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