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Applying Slow Design Principles for Culturing Wellbeing Through Lighting Installations
This article is an abridged version of a study that demonstrates how lighting installations designed with slow design principles can culture (cultivate and propagate) wellbeing. By Amardeep M. Dugar, PhD
The Use of Near-Field Data for Accurate Modeling of Horticultural and Germicidal Applications
For over a century, lighting designers have modeled luminaires as point light sources. This made perfect sense for a half-century of incandescent lamps. However, when linear fluorescent lamps were introduced…
Defining Biologically Appropriate, Healthy Lighting
Across human history, we have used “artificial” lighting to allow us to interact with our environment and perform tasks under conditions where the scarcity of daylight would otherwise prove an…
Lighting Uniformity in Horticulture
By Ian Ashdown, P. Eng. (Ret.), FIES Senior Scientist, SunTracker Technologies Marc Descoteaux Senior Software Engineer, SunTracker Technologies Written in 2015, “Greenhouse Design and Control” (Ponce et al. 2015) is…
Visible Light Disinfection
By Ian Ashdown, P. Eng. (Ret.), FIES Senior Scientist, SunTracker Technologies Visible light disinfection is a lighting industry innovation wherein violet light is claimed to inactivate pathogens such as bacteria…
Light and Intelligence
By Robert F. Karlicek, Jr.About 2,500 years ago, the Greek philosopher Heraclitus postulated that the only constant thing in life is change. Perhaps this statement is more true today than…
Horticultural Lighting Design and Déjà Vu
By Ian Ashdown, P. Eng. (Ret.), FIES Senior Scientist, SunTracker Technologies The phrase déjà vu translates from French as “already seen,” which nicely describes a current issue with horticultural lighting…
GUV Measurements – From the Lab to the Field
By Michael L. Grather, CTO, LightLab International Allentown, LLC We have all seen the wide range of new products claiming to be effective against pathogens of all sorts. Common claims…
luox – A new open-access, open-source platform for spectral computations
By Manuel Spitschan Around 20 years ago, a new type of cell was discovered in the human retina, the fine layer of tissue at the back of our eyes that…
The Test of Time
By Brian Liebel IES Director of Standards and Research This article is an expanded version the article found in the 50th Anniversary issue of LD+A, July 2021, providing additional background,…
Quantifying Light Pollution Sources: The Quintic Root of Hipparchus
By Ian Ashdown, Senior Scientist SunTracker Technologies Ltd. Nighttime light pollution is sadly familiar to all of us. While our grandparents and great-grandparents may talk fondly of seeing the Milky…
Double Dynamic Lighting — Bringing Qualities of Natural Light into the Office
Authors: Ellen Kathrine Hansen, Mihkel Pajuste; Aalborg University, Copenhagen In this new dynamic lighting approach, the sky type and daylight inflow are taken into consideration actively, bringing the dynamic office…
Applying Slow Design Principles for Culturing Wellbeing Through Lighting Installations
This article is an abridged version of a study that demonstrates how lighting installations designed with slow design principles can culture (cultivate and propagate) wellbeing. By Amardeep M. Dugar, PhD
The Use of Near-Field Data for Accurate Modeling of Horticultural and Germicidal Applications
For over a century, lighting designers have modeled luminaires as point light sources. This made perfect sense for a half-century of incandescent lamps. However, when linear fluorescent lamps were introduced…
Defining Biologically Appropriate, Healthy Lighting
Across human history, we have used “artificial” lighting to allow us to interact with our environment and perform tasks under conditions where the scarcity of daylight would otherwise prove an…
Lighting Uniformity in Horticulture
By Ian Ashdown, P. Eng. (Ret.), FIES Senior Scientist, SunTracker Technologies Marc Descoteaux Senior Software Engineer, SunTracker Technologies Written in 2015, “Greenhouse Design and Control” (Ponce et al. 2015) is…
Visible Light Disinfection
By Ian Ashdown, P. Eng. (Ret.), FIES Senior Scientist, SunTracker Technologies Visible light disinfection is a lighting industry innovation wherein violet light is claimed to inactivate pathogens such as bacteria…
Light and Intelligence
By Robert F. Karlicek, Jr.About 2,500 years ago, the Greek philosopher Heraclitus postulated that the only constant thing in life is change. Perhaps this statement is more true today than…
Horticultural Lighting Design and Déjà Vu
By Ian Ashdown, P. Eng. (Ret.), FIES Senior Scientist, SunTracker Technologies The phrase déjà vu translates from French as “already seen,” which nicely describes a current issue with horticultural lighting…
GUV Measurements – From the Lab to the Field
By Michael L. Grather, CTO, LightLab International Allentown, LLC We have all seen the wide range of new products claiming to be effective against pathogens of all sorts. Common claims…
luox – A new open-access, open-source platform for spectral computations
By Manuel Spitschan Around 20 years ago, a new type of cell was discovered in the human retina, the fine layer of tissue at the back of our eyes that…
The Test of Time
By Brian Liebel IES Director of Standards and Research This article is an expanded version the article found in the 50th Anniversary issue of LD+A, July 2021, providing additional background,…
Quantifying Light Pollution Sources: The Quintic Root of Hipparchus
By Ian Ashdown, Senior Scientist SunTracker Technologies Ltd. Nighttime light pollution is sadly familiar to all of us. While our grandparents and great-grandparents may talk fondly of seeing the Milky…
Double Dynamic Lighting — Bringing Qualities of Natural Light into the Office
Authors: Ellen Kathrine Hansen, Mihkel Pajuste; Aalborg University, Copenhagen In this new dynamic lighting approach, the sky type and daylight inflow are taken into consideration actively, bringing the dynamic office…