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Rich document Measurement of Angular and Spatial Resolved Spectral Rayfiles
The enhanced complexity of modern lighting systems has increased the importance of realistic light source models during the optical design process of LED-based luminaires. I. Rotscholl, Research Associate, K. Trampert, C. Neumann, I. Leopoldo Sayanca from the Karlsruhe Institute of Technology, U. Krüger and F. Schmidt from the TechnoTeam Bildverarbeitung GmbH, propose a method to enhance the often used LED light source model “rayfile” towards a “spectral rayfile”. A spectral rayfile would be a model that associates each ray with its own spectrum and therefore describes varying spectra as a function of angular direction and spatial starting position. The PMBS (physical motivated basis spectra) method is based on the assumption that each LED spectrum consists of a weighted sum of individual basis spectra, for instance those of individual semiconductors and phosphors. There is no need for any special measurement equipment but a classic nearfield goniophotometer and some off-the-shelf optical filters. This method requires at least one spectral measurement and just a minimum of goniophotometric measurements with different optical filters. Finally, the authors demonstrate the potential of this method by applying the concept on a typical LED and compare the results to the often used Blue/Yellow approach in terms of accuracy and applicability.
Rich document C header Tech-Talks BREGENZ - Dr. Wilfried Pohl, Research Director, Bartenbach GmbH
Bartenbach is one of the pioneers in light planning and lighting research. Since Christian Bartenbach Senior founded the engineering office in 1976, the company has been dedicated to light and visual perception. Several lighting inventions made over the years, can be attributed to Bartenbach. Dr. Wilfried Pohl, as a member of the Managing Board and Director of Research at Bartenbach GmbH, has played a substantial role in many developments. LED professional talked with him about Bartenbach’s history, education in the lighting business, the lighting parameters he deems very important, the quality of light, "Human Centric Lighting" and "Biodynamic Lighting“, and how LEDs have changed the light planning and lighting research company, in general.
Rich document 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.
Rich document EcoSense Introduces Slim Cove™ Dim
Today EcoSense announced the launch of Slim Cove™ Dim, a feature-rich, dimmable lighting solution that just happens to come in an elegantly affordable platform. Thoughtfully designed to meet the demands of lighting projects across any budget, Slim Cove™ Dim achieves the perfect balance of quality and value.
Rich document OLEDs Applied to Paper-Thin Stainless Steel
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, a provider of R&D in the field of organic electronics, will be presenting OLEDs on gauzy stainless steel foil during aimcal 2017 in Tampa/USA, from October 15-18, 2017. The novel application on display in Booth 22 was developed in cooperation with the Nippon Steel & Sumikin Materials Co., Ltd. (NSMAT) and Nippon Steel & Sumitomo Metal Corporation (NSSMC).
Rich document C header 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.
Rich document Helvar to Launch the World's First DALI-2 Certified LED Driver
Helvar is proud to announce that our filtered hybrid dimming DALI LED driver LL1x80-CR-DA is the first DALI-2 certified product in the world. Helvar will launch more products and services that meet the DALI-2 standard, representing a major step forwards in Helvar’s development of modern lighting components. Helvar continues to be at the very forefront of this technology, creating customer focused products that enhance the user’s experience of the built environment and reduce costs for property owners.
Rich document Samsung Introduces Highly Advanced, Enhanced CSP LEDs
Samsung Electronics Co., Ltd., announced two new additions to its chip-scale package (CSP) line-up: LM101B, a 1W-class mid-power LED, and LH231B, a 5W-class high-power LED. Built with enhanced CSP technology, the new LED packages deliver industry-leading efficacy and reliability for spotlights and high-bay lighting applications.
Rich document application/x-troff-ms DALI-2 Certification Launch Brings Improved Interoperability to DALI Lighting-Control Systems
The Digital Illumination Interface Alliance (DiiA), an open, global consortium of lighting companies that promotes the adoption of lighting-control systems using DALI technology, has launched its program for the certification of DALI-2 devices. DALI-2 certification brings the promise of significantly improved interoperability compared with current DALI devices in the market, thanks to comprehensive and detailed testing procedures. For each product, the DALI-2 test results are independently verified by DiiA before certification is granted.
Rich document Samsung Introduces Highly Advanced, Enhanced Chip-Scale LED Packages
Samsung Electronics Co., Ltd., a world leader in advanced digital component solutions, today announced two new additions to its chip-scale package (CSP) line-up: LM101B, a 1W-class mid-power LED, and LH231B, a 5W-class high-power LED. Built with enhanced CSP technology, the new LED packages deliver industry-leading efficacy and reliability for spotlights and high-bay lighting applications.
FEATURED

Industry Leading LUXEON 5050 LED Gets Performance Boost

Industry Leading LUXEON 5050 LED Gets Performance Boost Streetlights and high-bay fixtures require high flux and efficacy to meet the ever-increasing demands for system efficiency and energy cost reduction for these applications. Today, LUXEON 5050 LEDs received an upgrade in both flux and efficacy. Typical performance is now 675 lm with 172 lm/W in ... Read more »

FEATURED

Cree® XLamp® XM-L3 LEDs – More Output & Reliability

Cree® XLamp® XM-L3 LEDs – More Output & Reliability The XLamp® XM-L3 LED delivers a massive 55% upgrade in maximum light output over the XM L2 LED, providing a single-die LED point source for precise optical control. The XM-L3 LED shares the same mechanical and optical footprint as the original XM-L® and XM-L2 LEDs, providing a seamless upgrade path ... Read more »

EDITORIAL

Ledvance Extends Its BIOLUX HCL Range that Supports Circadian Rhythms

Ledvance Extends Its  BIOLUX HCL Range that Supports Circadian Rhythms Ledvance have launched a new range of BIOLUX HCL products which are tailored to the specific demands of healthcare environments. The new products provide biologically optimized day-night lighting which reflects natural circadian rhythms to benefit both patients and medical staff, improving sleep ... Read more »