Category: Light + Health

Product Monday: Virtual Sky With Moving Clouds

Artificial Sky offers a product, Virtual Sky, that utilizes LED luminaires which appear to be a blue sky with passing clouds overhead, birds flying, and sunrise and sunset effects. Virtual Sky can remotely change from overhead dimmable white task lighting to an ultra-realistic blue sky with moving clouds that mimic daylight entirely.

Image: ArtificialSky.com

Artificial Sky offers a product, Virtual Sky, that utilizes LED luminaires which appear to be a blue sky with passing clouds overhead, birds flying, and sunrise and sunset effects. Virtual Sky can remotely change from overhead dimmable white task lighting to an ultra-realistic blue sky with moving clouds that mimic daylight entirely. Virtual Sky has no size limitations, does not require suspended ceiling grids, and comes completely seamless for a full-view sky effect.

The purpose of Virtual Sky is to create lighting which naturally changes over the course of the day to expose people within the building to a range of white light that echoes the natural daylight outside, not only properties of daylight but actual moving views of nature as well.

The company claims the Virtual Sky has circadian health benefits and has been installed in senior care, hospital, hospitality, warehouse, office, and factory applications. Learn more here.

 

Image: ArtificialSky.com

 

Image: ArtificialSky.com

 

Image: ArtificialSky.com

 

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Product Monday: New Line Of Air Disinfection + Lighting Products From ETi Solid State Lighting

ETi Solid State Lighting Inc. has introduced a new line of LED light fixtures proven to kill bacteria and viruses, including SARS-Cov-2, the virus that causes COVID-19. The SilentAire Plasma Disinfection Lighting product line provides innovative and safe air disinfection technology.

ETi Solid State Lighting Inc. has introduced a new line of LED light fixtures proven to kill bacteria and viruses, including SARS-Cov-2, the virus that causes COVID-19. The SilentAire Plasma Disinfection Lighting product line provides innovative and safe air disinfection technology. According to the company:

  • SilentAire plasma light fixtures combine traditional ambient illumination with active air disinfection via an internal patent-pending Plasma Technology generator
  • Patent-pending internal Plasma generator utilizes Cold Plasma BiPolar Ionization Technology to actively treat and disinfect the air and kill bacteria and viruses, including SARS-CoV-2
  • Tested and proven by Innovative Bioanalysis, an independent third-party laboratory, to kill bacteria and viruses, including SARS-CoV-2, the virus that causes COVID-19, at a kill rate of +99.9%.
  • There are no risks associated with cold plasma bipolar ionization technology, according to the company; ions are naturally occurring and surround us all the time.
  • Requires no special installation and is controlled by simply toggling a standard wall switch.

More information is available here.

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Nearly All Mental Health Disorders Correlate With Circadian Rhythm Disruption

University of California, Irvine (UCI) researchers conducted a thorough examination of peer-reviewed literature on the most prevalent mental health disorders and found that circadian rhythm disruption (CRD) is present in nearly all of them. However, correlation is not causation, so it is not clear if the mental disorders cause circadian disruption, if circadian disruption causes mental disorders or both in a positive feedback loop.

University of California, Irvine (UCI) researchers conducted a thorough examination of peer-reviewed literature on the most prevalent mental health disorders and found that circadian rhythm disruption (CRD) is present in nearly all of them. However, correlation is not causation, so it is not clear if the mental disorders cause circadian disruption, if circadian disruption causes mental disorders or both in a positive feedback loop.

Pierre Baldi, UCI Distinguished Professor of computer science, and Amal Alachkar, neuroscientist and professor of teaching in UCI’s Department of Pharmaceutical Sciences.

The most common mental disorders were found to correlate with circadian disruption, including: anxiety, autism, schizophrenia, Tourette syndrome, ADHD, bipolar disorder, obsessive-compulsive disorder (OCD), anorexia nervosa, bulimia nervosa, food addiction, and Parkinson’s disease.

Circadian rhythms are intrinsically sensitive to light/dark cues, so they can be easily disrupted by light exposure at night, and the level of disruption appears to be gender-dependent and changes with age. One example is a hormonal response to CRD felt by pregnant women; both the mother and the fetus can experience clinical effects from CRD and chronic stress.

The researchers explored the interplay of circadian rhythms and mental disorders with gender. For instance, Tourette syndrome is present primarily in males, and Alzheimer’s disease is more common in females by a ratio of roughly two-to-one.

Age also is an important factor, according to scientists, as CRD can affect neurodevelopment in early life in addition to leading to the onset of aging-related mental disorders among the elderly.

To address causal attribution, the UCI-led team suggests an examination of CRD at the molecular level using transcriptomic (gene expression) and metabolomic technologies in mouse models. The researchers believe that if the experiments were conducted in a systematic way with respect to age, gender, and brain areas to investigate circadian molecular rhythmicity before and during disease progression, it would help the mental health research community identify potential biomarkers, causal relationships, and novel therapeutic targets and avenues.

This project involved scientists from UCI’s Department of Pharmaceutical Sciences, Center for the Neurobiology of Learning and Memory, Department of Computer Science, Department of Neurobiology and Behavior, and Institute for Genomics and Bioinformatics; as well as UCLA’s Oppenheimer Center for Neurobiology of Stress and Resilience and Goodman-Luskin Microbiome Center. The National Institutes of Health provided financial support.

You can read the full article published in the Nature journal Translational Psychiatry, here.

 

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Study Finds Care Home Falls Reduced 43% By Changing Light Spectrum & Intensity

The Journal of Post-Acute and Long-Term Care Medicine (JAMDA) recently published a research study showing long-term care facility falls were reduced 43% by changing light spectrum and intensity throughout the day for residents.

The Journal of Post-Acute and Long-Term Care Medicine (JAMDA) recently published a research study showing long-term care facility falls were reduced 43% by changing light spectrum and intensity throughout the day for residents. In four long-term care homes totaling 758 residents, investigators at Brigham and Women’s Hospital, led by Shadab Rahman, Ph.D., MPH, and Leilah Grant, Ph.D., of the Division of Sleep and Circadian Disorders, studied whether changing the intensity and spectrum of lighting across the day — which impacts neurocognitive processes such as alertness, mood and sleep — can reduce the rate of falls in elderly care-home residents.

In the homes, specifically, the short-wavelength (blue) content of ambient lighting was changed dynamically across the day and night at two sites, with fall rates at these sites then compared to the fall rates from the two other control sites, where the intensity and spectrum were fixed throughout the day and night. Overall, the researchers found a 43% reduction in the rate of falls for those who were exposed to the dynamic lighting versus those who were not.

“The ability to significantly reduce the rate of falls in long-term, care-home residents by implementing a relatively low-cost, passive, environmental intervention such as changing the spectrum and intensity of lighting throughout the day as a preventative strategy has major implications for improving health and well-being in this at-risk population,” said Rahman, the corresponding author of the study.

Falls are the leading cause of injury-related death for older adults (age 65+) in America. Since current interventions to reduce falls are multifactorial and require significant time and resources, pushes have been made to find alternative low-cost and low-burden solutions.

The full author list for the research study is:

  • Leilah K. Grant, Ph.D.
  • Melissa A. St. Hilaire, Ph.D.
  • Jenna P. Heller, BS
  • Rodney A. Heller, BS
  • Steven W. Lockley, Ph.D.
  • Shadab A. Rahman, Ph.D., MPH

The research article is published here.

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Two DOE Reports Characterize Current UV LEDs

The U.S. Department of Energy has released two reports which characterize the current state and viability of commercial ultraviolet (UV) LED products.

The U.S. Department of Energy has released two reports which characterize the current state and viability of commercial ultraviolet (UV) LED products. RTI International conducted these studies through a contract with KeyLogic Systems, working with the LED Systems Reliability Consortium (LSRC).

  • Initial Benchmarks of UV LEDs and Comparisons with White LEDs focuses on the construction and initial performance of commercially available UV LED components in radiometric and current-voltage tests. A test matrix containing 13 different UV LEDs was created in association with the LSRC. Testing involved at least 22 samples of each commercially available product (as of June 2021). In addition, two common, commercial white LEDs were tested to provide a benchmark against blue-pumped white LEDs. Read the report.
  • Operating Lifetime Study of UV LED Products focuses on the long-term performance and reliability of the same set of commercially available UV LEDs. Understanding the failure modes and failure rates of UV LEDs is important in understanding GUV product effectiveness over time and improving UV product reliability at the LED, lamp, and luminaire level. This information is critical to developing products with higher efficiency, lower carbon footprint, and significantly reduced environmental impact than the lighting technologies they replace. The study employed three stress tests to examine the reliability of each product. Results from stress testing, along with an extensive literature review, identified specific failure mechanisms across these UV LEDs. Read the report.

The COVID-19 pandemic put a spotlight on germicidal ultraviolet (GUV) radiation for air and surface disinfection. This technology area represents a growing opportunity to improve indoor air quality while saving energy over high-ventilation approaches. However, light-emitting diode (LED) GUV sources and fixtures available today have low efficiencies relative to visible LEDs or other UV sources (such as mercury lamps). Driven by demand for pandemic preparedness measures in buildings and good indoor air quality, many emerging GUV R&D activities target application effectiveness through increased source efficiency, improved fixture design, and enhanced reliability.

 

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UL Launches Circadian Lighting Field-Measurement Service & Circadian Luminaire Certification

Randy Reid and Katie Smith recently published an article on LinkedIn, about UL’s latest moves into circadian lighting.

Randy Reid and Katie Smith recently published an article on LinkedIn, about UL’s latest moves into circadian lighting. The first new service from UL is a UL Circadian Field Measurement System. This service will allow UL field engineers to take measurements in customers’ buildings and create a floor plan with color-coded spaces to show the lighting designers where light output is above or below their circadian-effective lighting goals. This allows for field measurements to be taken with results being demonstrated in a heat map format. This service can be utilized in existing retrofits or new conditions.

Instead of working off computer-aided design plans, the system captures the actual light at eye level, including ambient light from windows and skylights and artificial light from luminaires, along with all of the reflectance from ceilings, walls, floors, furniture, and more. With those measurements, algorithms are used to calculate the effectiveness of the light’s ability to signal to the brain that it is daytime. Those calculations then create the circadian heat map that illustrates in color where people in that space will reach the circadian goals. These are voluntary goals defined by the lighting designer, based on the circadian model that they have chosen.

The second service is their Circadian-Effective Luminaire Performance Certification. In this program UL develops a custom testing and certification program to support a manufacturer’s verifiable marketing claims.

You can read the full article here.

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Signify’s NatureConnect Generated Excitement At LFI

Signify’s NatureConnect natural lighting system mimics the natural patterns of daylight indoors to create a unique daylight experience. The intensity and shadows change throughout the day. It creates interesting lighting scenes designed to reconnect people with daylight cycles, and bring the outdoors in.

One of the products that I heard a lot of people talking about at LightFair, was Ledalite
by Signify’s NatureConnect. The NatureConnect natural lighting system mimics the
natural patterns of daylight indoors to create a unique daylight experience. The intensity
and shadows change throughout the day. It creates interesting lighting scenes designed
to reconnect people with daylight cycles, and bring the outdoors in.

Ledalite / Signify claims NatureConnect:

  • Enhances wellbeing and circadian sleep/wake cycle.
  • Boosts performance: Makes people feel more energetic and stimulates interaction and collaboration.
  • Creates an inspiring environment.

Additional spec features include:

  • Tunable scenes to provide melanopic light doses at the right time of the day.
  • An intuitive user interface allows the user to choose from different Day Rhythm or Light Scenes.
  • A dual 0-10 V input to allow control of brightness (for daylight regulation), set the scene, or turn the system off.
  • Natural balance of horizontal and vertical illumination changing during the day.
  • Pre-commissioned automated behavior code-compliant UI & sensor.

More information is available here.

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New Research Establishes UV Wavelength, Dose, & Duration To Deactivate COVID Virus

In a newly published study, researchers from Binghamton University’s Thomas J. Watson College of Engineering and Applied Science answer many of the questions about UV disinfection of the virus that causes COVID-19, and lay the foundation for health standards about what offers true disinfection.

A recent EC&M article discusses new research into the wavelength, dose, and duration of UV disinfection to deactivate the virus that causes COVID-19. In a newly published study, researchers from Binghamton University’s Thomas J. Watson College of Engineering and Applied Science answer many of those questions and lay the foundation for health standards about what offers true disinfection.

The paper, titled “Systematic evaluating and modeling of SARS-CoV-2 UVC disinfection” and published in Scientific Reports, is written by Distinguished Professor Kaiming Ye, chair of the Department of Biomedical Engineering; BME Associate Professor Guy German and BME Professor Sha Jin, along with PhD student Sebastian Freeman; Zachary Lipsky, PhD ’21; and Karen Kibler from the Biodesign Institute at Arizona State University.

The best results during the study came from a range of 260 to 280 nanometers, which is commonly used in LED UVC lights. Ye believes the most important part of this research is that it offers a scientific basis for standardizing and regulating claims from manufacturers of UV disinfectant devices.

“The system we came up with can become the model for anybody who wants to standardize the dosage,” he said. “This is how to determine the eradication of SARS-CoV-2 using UVC — maybe also SARS-CoV-3, SARS-CoV-4, SARS-CoV-5. We hope we never get there, but we need to be prepared.”

Read the full article here.

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Hospital Lighting Market Projected To Surge

A recent LD+A article discusses the significant growth projected in the hospital lighting market. Research and Markets unveiled in their Hospital Lighting-Global Market Trajectory and Analytics report that the global market is expected to reach $8.5 billion by 2027,

A recent LD+A article discusses the significant growth projected in the hospital lighting market.   growing at a compound annual growth rate (CAGR) of 5%a revised number from the previously projected $6 billion in 2020. Fluorescent lighting is now projected to reach $3.7 billion at a CAGR of 4.4%, while LED lighting has been readjusted to a growth rate of 5.5% for the next seven-year period. Highlights from the report include:

  • The U.S. Hospital Lighting market is estimated at $1.6 billion and China is forecast to reach $1.7 billion, with a CAGR of 7.6% over the 2020-2027 period.
  • Other notable geographic markets include Canada, Germany, and Japan; each is forecast to grow at 4.5%, 3.1%, and 2.8% CAGR respectively.

To learn more visit www.researchandmarkets.com , or read the full article here.

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Product Monday: It’s Not A Window, It’s LightGlass

LIGHTGLASS is a windowlight, an architectural element that brings the experience of a daylit window into any space. Through the integration of the latest LED lighting technology into the form and materials of a window, LIGHTGLASS is nearly indiscernible from a real window.

LIGHTGLASS is a windowlight, an architectural element that brings the experience of a daylit window into any space. Through the integration of the latest LED lighting technology into the form and materials of a window, LIGHTGLASS is nearly indiscernible from a real window.

LIGHTGLASS is a patented, prefabricated UL-listed lighting system with the appearance of a window, with integrated aluminum extrusion, glass, gasketing, and LED light panel delivering 94+ CRI, UGR below 12, no perceptible flicker, greater than 89% uniformity, and an L70 rating of over 100,000 hours. LED drivers included, and a system warranty of a minimum of 5 years.

CCT (Correlated Color Temperature) ranges between 2200K and 6500K as a standard feature. It’s possible to specify a single static CCT or dynamic Tunable White: user-controlled changes in CCT, used to recreate the dynamic lighting conditions of a typical solar day. This can be achieved by pairing LIGHTGLASS with a 3rd-party control system.

LIGHTGLASS is designed to produce broad-spectrum light, similar to sunlight. Warm and cool tunable LEDs work in unison to create a dynamic and immersive circadian lighting experience.

LIGHTGLASS is designed to aid circadian health indoors, providing the recommended levels of vertical illuminance at eye level when applied as a clerestory or window. Units produce short wavelength 450nm-490nm light at higher CCTs, optimized for creating a circadian response. LIGHTGLASS meets the WELL Building Standard EML requirements for Working Environments, Learning Environments, Living Environments, and Break Rooms.

More information is available here.

 

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