Top Articles
WHITE PAPER - The Calibration Traceability Chain of a Photometric LED Test System
FluxGage is a LED luminaire tester and provides a small and cost-effective solution for testing LED luminaires in 2π geometry. The black measurement surface and the lack of multiple reflections make the system much more predictable and allow using information about the DUT such as size, beam angle and surface reflectivity, to calculate correction factors.
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WHITE PAPER - How to Overcome the Security Challenges of Smart Lighting
IoT-powered lighting systems are backbones for smart building applications such as energy harvesting, space optimization, and predictive maintenance.
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IoT Ready Alliance Dissolves and Capitalizes on the Breadth of the NEW Zhaga Consortium
Zhaga and the IoT Ready Alliance are pleased to announce that they have agreed to align their efforts and to proceed as a single organisation under the Zhaga Consortium. The objective is to foster a harmonized, global set of interface specifications for sensor-to-luminaire integration and to remove confusion in the industry.
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Another LED Manufacturer Drops Its Lighting Unit: Cree to Sell Lighting Business to Ideal Industries
Cree, Inc. announces the execution of a definitive agreement to sell its Lighting Products business unit ("Cree Lighting"), which includes the LED lighting fixtures, lamps and corporate lighting solutions business for commercial, industrial and consumer applications, to IDEAL INDUSTRIES, INC. for approximately $310 million before tax impacts, including up-front and contingent consideration and the assumption of certain liabilities. Cree expects to receive an initial cash payment of $225 million, subject to purchase price adjustments, and has the potential to receive a targeted earn-out payment of approximately $85 million based on an adjusted EBITDA metric for Cree Lighting over a 12-month period beginning two years after the transaction closes.
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Zhaga and DiiA Unveil Joint Zhaga-D4i Certification Program
The Zhaga Consortium (Zhaga) and the Digital Illumination Interface Alliance (DiiA) have unveiled their joint Zhaga-D4i certification program, indicating plug-and-play interoperability of luminaires, sensors and communication nodes.
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DiiA Introduces D4i Bringing Standardization to Intra-Luminaire DALI
The Digital Illumination Interface Alliance (DiiA) has unveiled its new D4i logo and certification program for intra-luminaire DALI. D4i extends the existing DALI-2 certification program with additional features and functions, creating new possibilities for DALI in the IoT world.
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Fulham Demonstrates SIG-Qualified Bluetooth Mesh Wireless Lighting Control System at LightFair
At LightFair 2019 this week, Fulham, a leading supplier of lighting components and electronics for commercial and specialty applications, will display its new LED luminaire EliteControl hardware/software solution that uses Bluetooth mesh for wireless lighting control. The wireless luminaire control system includes an LED driver with a Bluetooth mesh interface, a new SmartBridge device for retrofitting luminaires with Bluetooth mesh controls, and an iOS commissioning app. All of Fulham's Bluetooth mesh solutions have been qualified as interoperable by the Bluetooth Special Interest Group (SIG).
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SETi and Seoul Viosys - Advanced UV LED Technology for Horticultural Applications
Sensor Electronics Technology, Inc, (SETi), a division of Seoul Semiconductor and Seoul Viosys are showcasing the LED industry's first product line encompassing the entire UV spectrum from 225nm to 405nm, developed for a range of applications, including horticultural lighting to enhance plant growth cycles and control diseases at LIGHTFAIR International 2019, at the Philadelphia Convention Center in Philadelphia, PA.
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Osram Quantum Dots Make LEDs Even More Efficient
Quantum Dots (QD), an innovative, tunable light conversion technology is now being used for the first time in the Osconiq S 3030 QD mid-power LED from Osram Opto Semiconductors. It marks the first step towards new LED components for the general lighting market. Osram's new mid-power LED Osconiq S 3030 QD was specially developed for area lighting and downlight applications and will empower customers to realize luminaires with high efficacy and excellent color rendering.
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-Star Lighting Introduces Circadian System for Automatic, Programmable Color Temperature & Dimming Controls
I-Star Lighting, an innovative global supplier of LED lighting fixtures, LED drivers, and advanced solid-state lighting controls, has developed a lighting system that enables users to program a full range of color temperatures and dimming options to adjust light output throughout the course of the day to provide a healthier, more human-centric lighting environment for interior lights. The I-Star Circadian System natural spectrum lighting combines several different I-Star technology innovations to produce a user-friendly, simplified lighting and control system.
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Acclaim Lighting Introduces Numerous New Products at LFi
Acclaim Lighting, a leader in innovative and advanced lighting technology, brought several new products to the show: Cylinder One HO, an exclusive, high output LED Series for long throw downlight applications; Flex AC Exterior Linear LED Strip for customized applications; Side Emitting Flex Tube SE Spectrum for dynamic exterior, customized color LED lighting applications. – Just to name three of the highlights.
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Bosch Brings Rugged, Bright Bluetooth® Light to Jobsites
Controlling an area light shining over the entire jobsite can be tricky when it's strapped to the rafters. That's why Bosch is introducing the future of connected lighting. The Bosch GLI18V-1200C 18V Connected LED Area Light with Bluetooth® offers users full control over the smart light using a mobile device. Pros can now turn the light on and off remotely, dim the light to the desired brightness, put it on a timer and even check the battery – all from the free Bosch Toolbox App.
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Luminous Motorbike Clothing for Enhanced Safety on the Road
Motorbike clothing manufacturer Held is cooperating with Osram to improve visibility on the road by including a range of models in its current collection that can be retrofitted with LED light modules from Osram. This move allows greater visibility and enhanced safety for motorcyclists during the night hours and in foggy and similar conditions.
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Osram Provides Special Grow Light System for Horticulture Research
Osram has developed a research luminaire to meet the growing demands of researchers at universities, private institutes and plant production in greenhouses and vertical farms. Researchers and modern agriculturists can use the LED-based plant luminaire system Phytofy RL in the lab or in climatic chambers in order to develop new plant-specific light and growth recipes. These recipes can lead to desired outcomes in plant quality, yield and flavor.
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Scientific Study Demonstrates Positive Effects of Daylight LED on Visual Comfort, Melatonin, Mood, Waking Performance, and Sleep
There has been an increase in research activity on the relationship between light and human bio-function, including a recent scientific study focusing on the effects of light spectrum on sleep quality, visual comfort, well-being and daytime alertness conducted by Prof. Christian Cajochen and his team at the University of Basel in Switzerland, entitled: "Effect of Daylight LED on Visual Comfort, Melatonin, Mood, Waking Performance, and Sleep."
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Controlling Current, Duty Cycle and Pulses Allows Color Tuning in Monolithic GaN LEDs
A new technique - the result of an international collaboration of scientists from Lehigh University, West Chester University, Osaka University and the University of Amsterdam - could pave the way for monolithic integration for simple color tuning of a light bulb, according to Volkmar Dierolf, Distinguished Professor and Chair of Lehigh's Department of Physics who worked on the project.
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Implications for Human-Centric Lighting Design in Tropical Nursing Homes: A Pilot Study
Light synchronizes our physiological and psychological rhythms to the 24-hour rhythm of the ambient changes. For the elderly, adequate environments to compensate for increasing frailty and sensory loss are crucial. Dr. Szu-Cheng Chien, Assistant Professor at the Singapore Institute of Technology reports from a pilot study that aimed to explore HCL design strategies in nursing homes in Singapore. Pre-/post implementation user surveys and quantitative evaluations were conducted.
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Melanopic Green - The Other Side of Blue
LpR 71 Article - page 74: For years now, there has been a controversial discussion about the amount of blue light in LEDs. Medical studies have shown that, depending on the amount, blue light at night disrupts the circadian rhythm. As a result, warm white (<3000 K) light sources are often touted as a solution for street lighting as well. Ian Ashdown, P. Eng. (Ret.), FIES Senior Scientist at SunTracker Technologies discusses whether or not it is sufficient to only look at the CDT or if other wavelengths and aspects should be considered. Numerous medical studies have shown that exposure to blue light at night suppresses the production of melatonin by the pineal gland in our brains and so disrupts our circadian rhythms. As a result, we may have difficulty sleeping. It is therefore only common sense that we should specify warm white (3000 K) light sources wherever possible, especially for street lighting. - True or false?
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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.
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Tech-Talks BREGENZ - Dr. Maja Grubisic, Researcher, Free University Berlin & Leibniz-Institute
Awareness of the ecological impact of technologies is becoming more important since climate change due to industrialization cannot be denied. LED lighting is one of the technologies that is deemed as a contributor in helping to reduce the impact caused by wasted energy. Unfortunately, light pollution, due to inefficient energy usage, is not the only problem. Besides the more recognized pollution from pesticides and chemical pollutants, light pollution also disturbs ecology and wildlife. Dr. Grubisic, Researcher at the Free University Berlin & Leibniz-Institute, has been working on this problem for more than five years now. She has written an article, also in this issue, concerning this. At the LED professional Symposium she was also good enough to grant this interview, providing some background information, explaining why light pollution is such an issue in biology and why this topic should be of concern to all of us.
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WHITE PAPER - The Calibration Traceability Chain of a Photometric LED Test System
FluxGage is a LED luminaire tester and provides a small and cost-effective solution for testing LED luminaires in 2π geometry. The black measurement surface and the lack of multiple reflections make the system much more predictable and allow using information about the DUT such as size, beam angle and surface reflectivity, to calculate correction factors.
Read more »
