LEDs Magazine - May/June 2017

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HORTICULTURAL LIGHTING

Plessey LEDs support vegetable
and flower horticultural lighting
applications

LED manufacturer Plessey has announced four horticultural lighting trials in the Netherlands that are using fixtures developed by the company that mix colored LEDs with its phosphor-converted white LEDs based on silicon substrates — generally referred to as gallium-ni-tride-on-silicon (GaN-on-Si) LEDs. Dutch companies Villa Gerbera, Gebr. Koot BV, Together2Grow, and Slijkerman are respectively testing the solid-state lighting (SSL) on Gerbera (daisy family), tomatoes, Alstroemeria (lily family), and Kalanchoe (a decorative succulent). The trials will run through the summer at which point the effectiveness of the LED

HOSPITALITY LIGHTING

Windsor restaurant applies
filament LED lamps in
architectural lighting design

Fettle Design has delivered a new architectural lighting design in a UK gastropub located near Windsor Great Park in Berkshire, relying on filament-style LED replacement lamps in both open fixtures and inside vintage globes. Chef and owner Steven Ellis, who trained under Gordon Ramsay, has converted two former gamekeepers’ cottages that date to the 1800s into a restaurant where the lighting design had to match the rustic setting. LED Eco Lights supplied the SSL from its Bright Goods line to deliver warm CCTs and fully-dimmable capabilities.

Restaurants have been a challenge for lighting designers looking to use LED-based lighting. Energy efficiency is critical in reducing energy costs given the long operating hours of many restaurants.

TUNABLE LIGHTING

Human-centric lighting reduces drug reliance at Danish psychiatric hospital

Professional staff at a Danish psychiatric hospital have administered fewer drugs and noticed a marked reduction in patient outbursts and disturbances following the installation of a human-centric lighting (HCL) system that tunes brightness and color temperatures to a pattern conducive with daytime stimulation and nighttime rest.

The Aabenraa Psychiatric Hospital installed the Ergonomic Circadian Lighting system, from Denmark-based Chromaviso, in September 2015. The Aabenraa deployment is part of an initiative by the Region of Southern Denmark to use HCL at psychiatric facilities ( http://bit.ly/2cL4Fnn).

Although factors other than lighting could have con-
tributed to the patients’ improvements, the survey spe-
cifically asked about the effects of lighting compared to
the old. It surveyed 200 staffers, 82 of whom responded.
Of those, 77% said patients are calmer; 65% said patients
sleep better; 57% reported fewer night-time disturbances;
44% noticed a reduction in physical force required to han-
dle disturbances; and 38% observed a reduction in drug
consumption among patients.