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Resources | LpR Article | Research News | CIE | Health | Sep 25, 2017

CIE Calls for Focused Research Efforts to Support Healthful Lighting Recommendations

CIE Calls for Focused Research Efforts to Support Healthful Lighting Recommendations Not so long ago, vision scientists thought that light detection - photoreception - was exclusively performed by rod and cone cells in the retina. Photobiologists, however, conclusively demonstrated otherwise with the identification of the intrinsically photoreceptive retinal ganglion cells (ipRGCs) [1]. Whereas rods and cones detect pattern and color, and send this information to the visual cortex, ipRGCs (of which we are learning there are several subtypes) detect irradiance, and route their information to many brain structures. The most thoroughly studied of these is the suprachiasmatic nucleus of the hypothalamus, location of the central circadian clock, where the light and dark signals trigger the offset and onset of production of the hormone melatonin. As shown in figure 1, however, ipRGCs also project to other structures, about which, as yet, we have little information. Read more »

Resources | LpR Article | Commentary | Business | Sustainability | Sep 21, 2017

Lighting Delivering Increased Value To Society - A Strategy For Growth

Lighting Delivering Increased Value To Society - A Strategy For Growth In recent years we have seen energy efficiency as the key driver for regulation as well as growth. Thanks to the arrival of LEDs the industry is already providing energy savings greater than any other sector. As the LED revolution rapidly continues, where next for the EU lighting industry? LightingEurope, the European industry association for the lighting industry has developed a strategy for growth which aims to fundamentally deliver value to society while aligning with the need to move towards a circular economy. Read more »

Resources | LpR Article | Quality | Applications | Sep 14, 2017

Technology Challenges in Professional Tunnel Lighting Applications

Technology Challenges in Professional Tunnel Lighting Applications The guide for tunnel lighting CIE 088:2004 is the most established international standard for the illumination of road tunnels. However, Switzerland’s ASTRA (Bundesamt für Strassen) and the ASFINAG in Austria both provide guidelines that go well beyond these requirements. Maximilian Herzig, Product and Key Account Manager Lighting at SWAREFLEX GmbH shows solutions to satisfy these requirements and explains why the commonly used value of "lumen per watt" is not a perfect method of evaluating system performance and efficiency. Read more »

Resources | LpR Article | Research News | CIE | Measurement | Calibration | Sep 13, 2017

CIE Research Strategy on Defining New Calibration Sources and Illuminants

CIE Research Strategy on Defining New Calibration Sources and Illuminants In photometry and radiometry, traceability of measurements requires appropriate calibration sources and transfer detectors. A major challenge is the technological revolution of lighting products towards LED lighting and the ban of incandescent lamps. This raises concern about the availability of incandescent photometric standard lamps in the future while the prices of such standard lamps are already increasing. In addition, calibration conditions should ideally be chosen to be as close as possible to the measurement conditions. Furthermore, the number of LED lighting measurements in laboratories and in the field has significantly increased, while the calibration of photometers is still done using incandescentbased standards. Therefore, it is important to investigate the pros and cons of replacement of conventional standard lamps with new solid-state technology. Peter Blattner and Tony Bergen, Division 2 Director and Secretary respectively, explain how CIE has defined the research topic “New Calibration Sources and Illuminants for Photometry, Colorimetry, and Radiometry” to address these concerns. Read more »

Resources | LpR Article | Commentary | Technologies | Trends | Sep 13, 2017

Brave New World and the Dualism of Light(ing)

Brave New World and the Dualism of Light(ing) The lighting business has been quite predictable over a long period of time. Technical changes were introduced slowly, dominated by a handful of leading companies, and mostly due to new, but not disruptive light sources. The life of engineers was mainly determined by a manageable number of parameters: Lighting requirements, light source parameters, costs, product dimensions, and the odd, required feature. Read more »

Resources | LpR Article | Research | LEDs | Manufacturing | Quality | Sep 07, 2017

Variability in LED Production and the Impact on Performance

Variability in LED Production and the Impact on Performance LEDs are subject to manufacturing deviations, which have an impact on the end product. Benoit Bataillou and T. Merelle, guest authors from Pi Lighting, review the surprisingly large impact on LED performance and light quality. They used traditional as well as modern indicators like CRI and TM-30 as well as the latest circadian indices to measure. The results are explained by spectral modeling and a variability study. They show the large impact on CRI, even with small deviations inside the same bin. Read more »

Security | LpO Article | Resources | Smart Lighting + IoT | Sep 05, 2017

Is the Light Industry Still in the Dark When it Comes to Cyber Security?

Is the Light Industry Still in the Dark When it Comes to Cyber Security? This May, the global news headlines announced that a penetrating chain of attacks had taken place. Over the course of just 24 hours, 45,000 cyber-attacks had taken place in 99 countries around the world. The ‘WannaCry’ ransomware attack hit multiple organisations hard, created over 200,000 victims, and even left vital operations having to be cancelled in UK hospitals. Read more »

Resources | LpR Article | Research | LEDs | Electronics | Manufacturing | Aug 24, 2017

Smart LED System in Package through Wafer Level Integration Approach

Smart LED System in Package through Wafer Level Integration Approach It is believed that LEDs will dominate all lighting applications in the near future. Integration and packaging are the two critical issues that, if resolved, will enable efficient and reliable solutions for lighting requirements. Z. Kolahdouz, H. van Zeijl, and G. Q. Zhang from the Institute of Microsystems and Nanoelectronics (DIMES) at the Delft University of Technology, and M. Kolahdouz from the Thin Film Laboratory and Nano-Electronics at the Department of Electrical and Computer Engineering of the University of Tehran show that wafer level packaging is a promising method to ensure lower cost, higher scale, and superior yield. A new integration approach of a smart unit of LED lighting is introduced: LED System in Package (SiP). Read more »

Resources | LpR Article | Research | Optics | Aug 10, 2017

Ultrathin Direct-Lit LED Module with Beam Shaping Thin-Film Optics

Ultrathin Direct-Lit LED Module with Beam Shaping Thin-Film Optics Thin, high quality, LED light panels are still a challenge. LED professional’s scientific partner, CSEM, investigated and developed a new approach with its partners, GAIKER-IK4 and BASF-SE. The authors, Oscar Fernández and Rolando Ferrini, from CSEM, Leire Barruetabeña, from GAIKER-IK4, and Sorin Ivanovici from BASF SE, present a solution that uses low-cost and spectrally poor, ultra-cool white LEDs in conjunction with optical color conversion foils, to transform the output to a high-quality light. They also describe a combination with added lime and red LEDs for a color tunable solution. Read more »

Resources | LpR Article | Tech-Talks Bregenz | Engineering | Technologies | Simulation Tools | Aug 01, 2017

Tech-Talks BREGENZ - Jamie Singerman, Future Lighting Solutions

Tech-Talks BREGENZ - Jamie Singerman, Future Lighting Solutions We recently sat down with Jamie Singerman, Worldwide Corporate Vice President, and Patrick Durand, Technical Director for Future Lighting Solutions, a leading provider of Solid-State Lighting technologies, engineering expertise and online simulation and design tools, to discuss the company’s differentiators and their views on the ever changing lighting market. Read more »

Resources | LpR Article | Research | Light Conversion | Jul 27, 2017

New Glass-Based Phosphors for White Light-Emitting Diodes

New Glass-Based Phosphors for White Light-Emitting Diodes Phosphors were always the key component of high quality white LED light. With the increased effîcacy and the higher power capabilities of blue high power LEDs, the phosphors become even more important for reliability, color consistency and overall light quality. Franziska Steudel, Florian Wagner, A. Charlotte Rimbach, Bernd Ahrens, Peter W. Nolte and Stefan Schweizer, scientists at the Fraunhofer Application Center for Inorganic Phosphors, a Branch Lab of Fraunhofer Institute for Microstructure of Materials and Systems IMWS, investigated different glass and ceramics based phosphors for white LEDs. Read more »

Resources | LpO Article | Statements | Horticulture | Jul 25, 2017

Paul Scheidt, Cree - Horticulture Lighting

Paul Scheidt, Cree - Horticulture Lighting "When you go into horticulture application the light output level directly correlates to the yield that you see in the plants. There is no buffer, when lights dim, the yield goes down. If something degrades very quickly and is 100% for one growth cycle then goes down to 90% for the second growth cycle, you will see a reduced yield. There is no room for adjustments." Paul Scheidt Read more »

Resources | LpR Article | Research | Optics | Applications | Jul 17, 2017

Roadway Lighting Optics for Environment Adaptive Spatial Light Distribution

Roadway Lighting Optics for Environment Adaptive Spatial Light Distribution Roadway lighting for different environmental conditions is a challenging task. But even more challenging is to find a solution with outstanding task efficiency for both dry and wet tarmac surface conditions. The drawback of these types of solutions is that they are usually made up of two different lighting systems. Since the two systems are not usually used to an equal degree, they age at a different rate. Solving this problem is very complex. Viktor Zsellér, PhD student, and Dr. Krisztián Samu, Senior Lecturer, both from the Budapest University of Technology and Economics, propose an optical system that solves this conundrum. Read more »

Smart Lighting + IoT | Outdoor Applications | Resources | LpR Article | Jul 13, 2017

Enabling Total Control in the Next Generation of Outdoor Lighting

Enabling Total Control in the Next Generation of Outdoor Lighting Outdoor lighting is certainly one of the applications with the greatest potential for energy saving. Although many approaches are discussed, they all end up with a smart lighting solution. In order to accommodate this, intelligent software and electronics are required as well as standardized, robust interfaces. Ronald Weber, Global Industry Manager, Building Automation and Benjamin Nelson, Business Development Manager, Intelligent Buildings, both from TE Connectivity, present a Zhaga compliant solution. Read more »

Resources | LpR Article | Commentary | Applications | Quality | Jun 29, 2017

A Lighting Designers Relativity of Light Performance

A Lighting Designers Relativity of Light Performance The LED will always be the superstar of light sources. Their precise and clear lighting possibilities have been targeted by lighting planners and architects for the past ten years. The coming years will see the performance of the LED getting progressively closer to the spectrum of daylight and that will, in turn, generate biologically effective LEDs that are even higher in contrast and promise a new kind of feel-good light. Read more »

FEATURED

Emergency Lighting Just Got Smarter

Emergency Lighting Just Got Smarter NEW NOW: OSRAM’s standalone solution for emergency lighting testing, reporting and maintenance. Meet the QBM DALI EL-T CONV, a converter transforming existing DALI emergency luminaires into wireless ones, all controlled by the same lighting system. Its benefits? Allowing you to design all the ... Read more »

FEATURED

Continuous versus Discrete Calibration Sources: Consideration for Use

Continuous versus Discrete Calibration Sources: Consideration for Use Rapid advancements in the field of solid-state lighting have presented opportunities for the use of LED-based systems for calibrations typically performed with lamp-based sources. Their highly efficient and long-lived performance, rapid power up, and compact size have made LED-based sources an ... Read more »

FEATURED

LUXTECH Offers First Compelling Flex Modules Designed to Replace Traditional Rigid Modules: LUXroll (UL Listed)

LUXTECH Offers First Compelling Flex Modules Designed to Replace Traditional Rigid Modules:  LUXroll (UL Listed) The Indirect Costs of Using Rigid Boards Make Switching to Flexible LED Modules a Compelling Choice. Read more »

EDITORIAL

New LUXEON Rubix Cyan LED Enables 96-98 CRI Across CCT Range in Color Driven Solutions for Entertainment, Stage, and Studio

New LUXEON Rubix Cyan LED Enables 96-98 CRI Across CCT Range in Color Driven Solutions for Entertainment, Stage, and Studio Lumileds added cyan, its eighth color, to the LUXEON Rubix high-power LED family enabling multi-color driven systems to produce very high CRI white light that is so important in entertainment lighting. Adding the cyan LED fills a significant wavelength gap between blue and green in a system and ... Read more »

EDITORIAL

New date: Light + Building Autumn Edition 2022

New date: Light + Building Autumn Edition 2022 Frankfurt am Main, January 10, 2022. As the pandemic situation continues to develop very dynamically, Messe Frankfurt is postponing the world's leading trade fair for light and building technology to autumn 2022. Last December, intensive discussions with customers and cooperation partners had ... Read more »

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