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    FIG. 1. The photopic luminosity curve in the CIE 1924 standard is used in lux, lumens, and other metrics (blue), whereas the optimized luminosity curve of Sharpe et al. (2005, 2011) corrects the underestimate of short-wavelength luminosity. (Image credit: Illustration used with permission from Wood 2014 - (https://bit.ly/3tQRo0P.)
    Lighting for Health & Wellbeing

    LEDs must spectrally balance illumination, circadian health, productivity, and energy efficiency (MAGAZINE)

    April 20, 2021
    For best results in the built environment, quality LED lighting requires a delicate balance of spectra that optimize multiple objectives for the ideal experience and performance...

    ProPhotonix has developed the Cobra Clean FX1 UV-C LED module that radiates at 265 nm, a wavelength that has been said in recent studies to deactivate the novel coronavirus SARS-CoV-2 instantaneously at proper doses. (Photo credit: Image courtesy of ProPhotonix.)
    Ultraviolet C-band (UV-C) LEDs are poised to provide broader disinfection of diagnostic imaging systems used in healthcare, with PDC Facilities’ UV-C LED Bore Sanitization System under evaluation now. (Photo credit: Image courtesy of PDC Facilities.)
    Cmeadows Lites Blog
    A collaborative project at Aalborg University, involving lighting and controls companies Fagerhult, iGuzzini, Zumtobel, and Tridonic, has found that more dynamic lighting combining both natural and electric light has enhanced worker comfort and productivity in the workspace. (Photo credit: Images courtesy of Zumtobel.)
    GoodLeaf director of horticulture Krilen Ramanaidu with LED-grown pea shoots. (Photo credit: Image courtesy of Signify.)
    Photo credit: Image courtesy of Peace Tree Farm from HortiCann Closing Plenary presentation.
    Keynote speaker and well-known researcher Bruce Bugbee opened day 1 of the HortiCann Light + Tech virtual conference. (Photo credit: Image capture from HortiCann video presentation.)
    It’s showtime now for UV-C at Madrid’s Teatro Real, pictured above a from few years ago. (Photo credit: Image by Alejandro via Flickr; used under CC BY 2.0. Licensing information available at: https://creativecommons.org/licenses/by/2.0/.)
    Lighting for Health & Wellbeing

    Venerable Spanish theaters deploy UV-C to disinfect coronavirus

    Mark Halper
    Oct. 16, 2020
    Lamps from China’s Goldensea will serve as repeated surface wipes at Madrid’s Teatro Real opera house and Toledo’s Teatro Rojas. But not when people are present.
    When space is tight in vertical farms, such as with cucumber crops, a thin LED instead of a conventional one might be the way to go. (Photo credit: Image by Julia Schwab via Pixabay; used under free license for commercial or non-commercial purposes. Photo is not representative of specific companies or applications mentioned in this story.)
    Horticultural Lighting

    Scandinavian companies embedding LEDs into vertical farm shelving

    Mark Halper
    Oct. 15, 2020
    There’s something thin in the state of Denmark, and it’s working its way into some tight spaces.
    Lisianthus, or Texas bluebell, can be cultivated in many colors. Here Lugt Lisianthus co-owner Marcel Lugt cradles a pink variety under a mix of high-pressure sodium (HPS) and LED luminaires. (Photo credit: Image courtesy of Signify.)
    Horticultural Lighting

    Once again, LED moderates the greenhouse temperature

    Mark Halper
    Oct. 13, 2020
    If you can’t take the heat, get out of the HPS kitchen? Or maybe try mixing with LED. That’s what Lugt Lisianthus did in Holland, benefitting from climate, light levels, and light...
    FIG. 1. In a cannabis grower operation, light mapping software can drive the optimal placement and light distribution characteristics of LED grow lights. (Image credits: All images courtesy of Black Dog LED.)
    Horticultural Lighting

    Implement light mapping software from a plant perspective to improve cannabis grows (MAGAZINE)

    Oct. 8, 2020
    KEVIN FRENDER explains how light mapping must be approached in a plant-centric grower operation versus the human-centric built environment, and presents its value in the project...
    FIG. 1. A possible implementation of a spectrally-optimizable lighting system illustrates the role of sensors to detect reflectance from objects to emit light tuned to the spectra of each object, rendering realistic color and detail. (Image credit: Graphic concept by Dorukalp Durmus, illustrated by Mike Reeder.)
    Lighting for Health & Wellbeing

    Spectral optimization shows potential to improve energy efficiency and quality-of-light experience (MAGAZINE)

    Alp Durmus
    Oct. 8, 2020
    Researcher ALP DURMUS describes an SSL system that relies on optimized spectral output to achieve integrative lighting’s objective of uniting color science and visual perception...