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Events
Technologies, applications, trends, research

LpS & TiL Post Show Report

The LpS post show report is a feature of the last edition in the year of the LED professional Review. The report gives an overview of the event for all those that could not attend. This is also an opportunity to identify upcoming and fading trends, hot topics, new technologies and approaches. This year promises to be especially interesting because the co-located TiL event was curated by Rogier van der Heide who managed to bring some extraordinarily interesting personalities to Bregenz with thought-provoking talks.

LpS Best Papers
Scientific award winning paper on the influence of the lighting concept on wellness and performance

The Winning Paper: Lighting and Emergency Department Clinician Wellness and Performance Improvement

Short wavelength (“blue”) light is known to mediate “non-visual” effects of light in humans. These effects that go beyond the pure “visual” function can affect human wellness and performance, as it has been reported in previous scientific research in laboratory, office, education, clinical and aero-space setups. In healthcare research, lighting has been recognized in the fields of human factors, ergonomics, and systems engineering, as an environmental factor that can affect the quality of the delivery of care; in particular, clinician wellness and performance, and the occurrence of medical error. The paper discloses the results of a pilot study and shows if and how a radically new lighting concept can improve wellness and performance in an emergency department.

Research Reports
OpenAIS

User Evaluation of the OpenAIS Pilot Installation

The Internet of Things is rapidly entering the lighting domain. The OpenAIS project developed an IP-based lighting architecture and realized a large-scale pilot implementation of an IoT lighting system with advanced sensor-driven controls and user control in a real office. This article reports on an extensive study that evaluated peoples’ use and experiences with the new lighting controls system, the smartphone app for personal lighting control, and the app for dedicated room control tablets.

Technologies
DC microgrids, DC current, drivers

48 VDC Integrated Drivers Offer New Options

The growing global trend to direct current (DC) power supply in building “microgrids” presents opportunities for solid state lighting designers. The article shows that DC building power distribution simply has too many benefits to be ignored. It describes how LED lighting fixture designers can now design luminaires around a 48V DC constant voltage input, available to take advantage of the benefits of a low voltage DC distribution grid in a building.

Technologies
Controls,  Bluetooth technology, protocols

Bluetooth Mesh Protocol as Applied to Lighting

Little more than one year ago, Bluetooth SIG released the Bluetooth Mesh standardization. Meanwhile it has become widely adopted and is also one of the favorite systems for lighting controls. The proposed article starts with an explanation of the Bluetooth Mesh protocol as applied to lighting control and define its key elements. In a second portion of the article, questions that lighting control evaluators could be asking their vendor will be answered.

Applications
Horticulture lighting, LEDs

Enriching Horticultural Lighting for Faster Growth and Better Crops

Horticulture lighting is not a new lighting application, but it gained momentum with the introduction and evolution of LED lighting. In the meantime it is one of the fastest growing markets in lighting. The article shows how LED-based horticultural lighting can deliver even bigger advantages for commercial growers by introducing additional wavelengths that increase photosynthetic response.

Environment
Impact of artificial light on animals

Hazard or Hope? - LEDs and Wildlife

The introduction and widespread uptake of LEDs as outdoor lighting has caused no small amount of concern amongst conservation biologists. The prevailing impression that LEDs are always blue-white is well founded as adoption of LEDs for streetlights were invariably high color temperatures and with the deterioration of phosphors the blue wavelengths penetrated even more. But LEDs do have characteristics that differentiate them from other light sources and may allow for the reduction of environmental effects of lighting on species and habitats: direction, duration, intensity, and spectrum. The article sheds light on all these aspects.

Environment
Direct and indirect impact of artificial light at night on agroecosystems

Effects of Artificial Light at Night on Agroecosystems

In recent decades, artificial lighting has become an integral part of the modern world. While the use of artificial light at night (ALAN) greatly benefits people, it often has unintended, negative consequences for wildlife and ecosystems. In particular, the increasing use of LED lighting raises ecological concerns due to its high content of blue light, to which many organisms are sensitive. This article discusses how ALAN can directly and indirectly influence agroecosystems, with potential consequences for food production and biodiversity. Given the current lack of integrative studies on this important topic, the better understanding of effects of ALAN in agroecosystems is urgently needed.