Review Lpr the Global Information Hub for Lighting Technologies Nov/Dec 2019 | Issue 76

www.led-professional.com ISSN 1993-890X

Review LpR The Global Information Hub for Lighting Technologies Nov/Dec 2019 | Issue 76

Interview: Ruairí O'Brien Research: Freeform Micro-Optics Technologies: Tuneable White & Smart Lighting Special Topic: Peripheral Discomfort Glare

CATEGORYEDITORIAL 4 Experience the Future of Lighting

The LpS/TiL/DALI Summit 2019 event is over. They were intensive days where the latest trends in applications and technologies were discussed. What are the key insights that we can derive from this?

Sustainability seems to have a new value in the world of light. It's about developing sustainable systems and using light sustainably. Life Cycle Assessments (LCA) show materials and energies that need special attention. Many new system developments show new approaches to solutions in precisely these areas. Repro-Light, an EU-funded project, is investigating new solutions for sustainable lighting. In particular, the issues of modularity, upgradeability and recyclability play a major role in this project.

The quality of light, greater miniaturization and digitization and the handling of data remain further trendsetters in the field of light. In this LpR issue we also deal with the topic of Visual Perception, which was also discussed in detail - also in connection with Human Centric Lighting - in Bregenz.

A detailed post-show report can be found in this issue as well.

Industrial revolutions always occur when major changes occur at the same time in the areas of communication, energy and mobility. There is no doubt that we are experiencing this to a large degree today - lighting is also affected by this and can make a very significant and positive contribution to the future development of society.

In this new smart world, we also need a stronger commitment to the environment. With light, we have an essential resource in our hands.

Yours Sincerely,

Siegfried Luger Publisher, LED professional

CONTENT OVERVIEW 6

COMMENTARY REGULARS 08 Personal Lighting Profiles Might Be the Key to Creating a Natural "Work Light Balance" 04 EDITORIAL by Henrik Clausen, Fagerhult Lighting Academy 08 COMMENTARY 10 COMPONENT NEWS 18 APPLICATION NEWS TECH-TALKS BREGENZ 20 RESEARCH NEWS 30 Ruairí O'Brien, Founder of Ruairí O'Brien Lighting Design 24 ORGANIZATION NEWS compiled by Dr. Guenther Sejkora, LED professional 28 REGULATION NEWS

RESEARCH 94 ABOUT | IMPRINT 40 Micro-Optics for Efficient LED Spotlights with Arbitrary Farfield Distributions by Dr. P. Schreiber and Dr. Ch. Waechter et al., Fraunhofer IOF HIGHLIGHTS 30 Ruairí O'Brien, Ruairí O'Brien. EVENTS Architektur. Licht Raumkunst 48 LpS & TiL 2019 Post Show Report – Focus on Applications and New HCL Ideas compiled by Dr. Guenther Sejkora, by Arno Grabher-Meyer, LED professional LED professional

TECHNOLOGIES 68 A White Light Tuning Strategy that Fuels HCL by Wouter Soer, Lumileds

74 A New LED Controller Technology to Expedite the Next Level of Smart Lighting by Kurt Marquardt, Infineon Technologies

78 Fluorescence-Free Radiant Flux Measurement of UV LEDs by M. Clark, R. Zuber & M. Ribnitzky, Gigahertz-Optik 40 Micro-Optics for Efficient LED Spotlights with Arbitrary Farfield Distributions by Dr. P. Schreiber and Dr. Ch. REGULATIONS Waechter et al., Fraunhofer IOF 82 New Ecodesign Regulation on Flicker and Stroboscopic Effect in LED Lighting by M. Przybyla & P. Czarnecki, GL Optic

SPECIAL TOPICS 86 Measure Influence of Discomfort Glare on Task Performance Using the Stroop Task to Circumvent Participant Assessments by Mads Mårbjerg, Buro Happold Engineering Berlin

ADVERTISING INDEX

FUTURE LIGHTING SOLUTIONS 1 CREE 9 LPS 67 FLS-SIGNIFY 2 FLS-LUMILEDS 21 HEP 77 INSTRUMENT SYSTEMS 3 NICHIA 27 TOPLITE INTERNATIONAL 85 EVONIK 5 GLD 29 LPR 95 FLS-NICHIA 7 TIL 47 WÜRTH 96

COMMENTARY WORK LIGHT BALANCE 8

PERSONAL LIGHTING PROFILES MIGHT BE THE KEY TO CREATING A NATURAL "WORK LIGHT BALANCE"

What do I mean by a natural "work light Put simply, lighting is vital for our health. balance"? - I dream of creating a world We do know that blue light is a crucial where the lighting control lies in the hand component of daylight that contributes of the end users. Where preprogrammed to synchronization of the circadian clock, lighting scenes are attuned to our internal, human alertness, memory and mood. ancient, natural biology. Similarly, low levels of light–particularly amber light–can promote better sleep. We're getting older. Not just individually, but collectively. According to United I believe that the universalization of Nations estimates, the number of people lighting design is about empowering Henrik Clausen over the age of sixty will have more people to personalize their lighting to suit B Eng; M IDA, M IESNA, than tripled by the end of this century. the tasks they undertake, at the time of Associated Professor, AAU Such exponential growth in our older day (and indeed time of life!) in which Henrik has been involved generations is symbolic of global progress they complete them. To do this properly, in lighting for over 30 years and prosperity. But could the spaces we need a better understanding of the we occupy be eroding our quality of life many variables that influence how we in both commercial and as we age? respond to light stimuli throughout our life. academic positions. In 1996, he became The capacity to receive and respond Research shows that human centered to light changes dramatically as we lighting design makes people feel more the Managing Director reach the later stages of life. Just like alert, productive and happy. More detailed of Fagerhult Lighting in the muscles in our arms or legs, studies are required to help us understand Denmark, and held that our lens muscles start to lose elasticity. how light affects performance across a Focusing gets harder and blurred vision broader range of visual, biological and position until 2004, ensues. Yellowing of the lens can affect emotional metrics. when he founded the color perception. We find it fatiguing to Fagerhult Lighting Academy. transition between high and low-light I believe that this research could yield conditions. As people will work into their valuable results for businesses in terms In 2015 he also became 70s and beyond, the principles we apply of enhanced productivity, wellbeing and Head of Research for to lighting design must respond to their employee retention, and help us to explore Fagerhult. Henrik holds a changing needs. To facilitate the health new possibilities to harness light as a and wellbeing of our fastest growing powerful force for preventative health, position as professor in generation, we need to start thinking emotional resilience and general wellbeing. Lighting Design at AAU about illumination in an entirely new light. in Copenhagen. He guest With the help of technology, the potential Employees have the choice to stand or sit, for 'light personalization' in the workplace lectures at various adapting their workspace to align with is huge. With an app, and a strategic Universities around the personal preferences. Offices now have a combination of overhead, task and world. He speaks worldwide, selection of zones, some geared towards ambient light sources, workers can quiet concentration, others designed for be empowered to dial up blue light in primarily addressing the active collaboration. The archetypal worker the morning to feel energized and human and emotional aspects is young, but lighting in the workplace must more focused or increase amber light of light and lighting design. support the productivity, comfort and in the afternoon to feel more relaxed, wellbeing of people at all ages. reduce stress and promote calm.

While our understanding of light's impact The challenge, should we wish to accept it, on humans is far from comprehensive, is creating a world of 'work light balance' science has drawn direct connections where illumination control is in the hands of between light, bodily timing (circadian the worker and lighting schemes are attuned rhythms) and hormones. to our internal, ancient, natural biology. H.C.

CATEGORYNEWS COMPONENTS 10

Xicato Announces The loss of natural light benefits affects Availability of XOB those who spend most of their time indoors, with office workers being one of the groups with 14.5 mm LES especially at risk. According to Harvard Xicato, the leading provider of smart Business Review, the "health benefits of building wireless controls and highest quality access to natural light are causing some light sources, announced the immediate firms to re-imagine their workspace and tout availability of the XOB high-density light this as a recruiting tool."[1] The lighting source in 14.5 mm LES with nearly 5,000 lm industry is moving beyond the efficacy race output. The benchmark light quality of XOB With Salud™ LEDs, Luminus specifies and towards human centric lighting solutions series with an R9 of 50 at 90 CRI and an R9 melanopic / photopic ratios (MRs) for incorporating circadian elements that may of 90 at 95 CRI provide the best options for new human centric lighting LEDs impact well-being for anyone spending strong color rendering in industry standard extended periods of time indoors. sizes for easy adoption. Scientists studying human circadian rhythm and the physiological reaction to light have Thrive uses proprietary chip, phosphor determined that low MRs are a signal to the and packaging technologies to deliver a body to prepare for sleep, and higher MRs close spectral match to natural light. tell the body to be more alert. The high-fidelity spectral output of Thrive creates stunning environments with excellent Standard warm CCT LEDs (3000 K to 4000 K) color rendering and outstanding TM-30 commonly used across the lighting industry metrics. Unlike other high CRI light sources, have low MRs, which can reduce alertness Thrive has been engineered specifically to and productivity. Cool CCTs have high MRs provide a close and continuous match to and people are generally awake and alert in natural light across the visible wavelength XOB delivers the most beautiful, consistent, this light. However, in offices and other public range to enable the next wave of innovation natural light that specifiers and end users spaces, such cool CCTs are considered too in the lighting market: human centric lighting. have been craving, now also with an LES of "blue" and typically not desirable. 14.5 mm Thrive SMD 2835 1 W 9 V and V10C are now Salud bridges the gap with warm CCTs available for ordering. Additional SMD 2835 Applications for the powerful output of the and high MRs for healthy, productive, and and V Series form factors will be available in 14.5 mm LES include office, hospitality, comfortable environments. Salud LEDs late Q4 and early Q1 2020. residential and healthcare just to name a few. and datasheets are immediately available. The 14.5 mm LES XOB has had strong "Today's announcement reflects our pledge demand from light designers who need to customers to deliver a clear path toward the same quality offered in the Company's flexible, interoperable solutions to meet 6 and 9.8 mm LES XOBs with the Bridgelux - New Lighting lighting requirements that demand natural- consistency of color point for seamless Solutions, Naturally looking light, particularly projects in the integration where comfort, color matching office, education, healthcare, residential and and quality matter. Enabling LED industry transformation for over retail markets," said Dr. Brian Cumpston, 15 years, Bridgelux has reinforced its focus Vice President of Solutions Development and commitment to the lighting market with at Bridgelux. "We are a technology partner the commercial availability of Thrive™ surface committed to delivering new LED light source Luminus Salud™ LEDs mount device (SMD) 2835 and V Series™ solutions as our roadmap evolves, including Suppress Melatonin chip-on-board (COB) parts. Thrive white an expansion of