Category Archives: Light Pollution

Color Shift


  • Aging UV exposure may cause plastics to change color
  • Operating conditions and contaminants in the atmosphere may cause color changes


  • Defines the color point specification of lamps
  • Guidelines for how a person can distinguish between similar colors
  • 2 step ellipse: 2 times the just noticeable difference in color


  • Measure the output of the LEDs AND sort them into various ranges, or bins, before sale, based on color and flux
  • Size and range of colors of the bins is critical to determine how close a match the LEDs will have to each other and the color variation between units
  • All supplied LEDs must fall within a 2 step macadam ellipse [lm-79 and lm-80 of IESNA]


  • Measure of color fidelity
  • Does not account for object color shifts that increase color saturation which can enhance visual preferences, color discrimination ability and visual clarity


  • Being developed by the national institute of standards and technology to be considered for the TC 1-69
  • Ability to account for the direction of object color shifts
  • Represents the overall color quality of products for all types of light sources

Creating Sustainable Lighting Solutions

Bushwick Park: project by AWA Lighting Designers

Bushwick Park: project by AWA Lighting Designers

Over time, the architectural community has become increasingly invested in the realization of environmentally sustainable design, and this trend shows no sign of abating. This is a global movement. Sustainable solutions acting in a major metropolis can save building owners significantly on operational costs and cut back in vast quantities on the carbon emissions that would otherwise pervade. And, in other parts of the world, sustainable lighting solutions can make the difference between continuing one’s day, be that education, work or home tasks, or allowing darkness to swallow up needed hours of productivity. Thus, sustainability touches us all.

From low impact materials to energy efficiency, to design for reuse and recycling, there is much to be done. In this context, design connects architects with their partners and consultants, as they work toward their common goal of defining and creating structures that live up to the promise of sustainability. With architecture, technologies, materials and products all merge to create the tangible pieces of lighting design. In their collective application we see the final effects, and the success or failure of strategies and visions. How these pieces are put to use by installers and later by building occupants has tremendous importance on their visual comfort, efficiency performance, function and beauty that must be considered carefully from design inception.

Able to realize the vision of their architectural partners, lighting designers are critical members of the process. For, it is very true that one of the most efficient ways to reduce the overall carbon footprint of a structure is to amend its lighting design with smartly conceived and realized design. And, in the developing world, sustainable lighting nourishes the very essence of life. Thus, although it is just one piece of the puzzle, lighting has an outsized effect on sustainability. Understanding what is possible in this arena only serves to invigorate a practice and encourage new paradigms.

Light triggers critical physiological and psychological responses within human beings. And, since most of us spend the majority of our lives in the built environment, the level and quality of light within these buildings has real implications for our health and wellness. Luckily, today’s architect is armed with sophisticated structural options that allow for more lighting choices than at any point in architecture’s history. In today’s design world, it is no longer a question of whether to design with light in mind, but how to design with light in mind. As we become more aware of light’s implications on our physiological and psychological selves, and as technology affords a greater range of options, architects and their partners are left with an increased repertoire to draw from.  As it relates to health and wellness, the key points to consider are the quality, the quantity and the type of light being delivered within the space. 

Consider first how light comes into play in a health-oriented society. Many functions necessary for growth and well being such as breathing, sleeping, blood pressure, body temperature, appetite, moods, mental acuity, and the immune system are governed by the endocrine system, which is strongly impacted and affected by light, both natural & created by electric sources. There is also evidence suggesting that proper quantities of visually perceived light are needed for healthy functioning of the cerebral cortex, the part of the brain that controls motivation, learning, and creativity; the limbic system, the part of the brain that stores emotional impressions of the world; and the motor cortex and the brain stem, the parts of the brain that coordinate body movement and the maintenance of life.

CityTouch – Innovative Remote Lighting Management System to control street lighting

Philips brings new lighting system to Middle East

The smart “plug and play” approach, possible with the CityTouch Ready luminaire.

Philips launched its innovative remote lighting management system, CityTouch, which uses mobile and cloud-based technologies to control street lighting, in the Middle East. The new technology supports today’s vision on sustainability and livable cities. The lighting solution enables cities to save energy, reduces maintenance, and improves safety on streets, due to better visibility, and enhances operational efficiencies. Intelligent lighting is the future of sustainable city lighting. CityTouch connect app not only allows dynamic, intelligent and flexible control of street lighting with dimming control and schedule setting, it also provides the precise amount of light needed at any place and time, saving energy and providing the right level of visibility on the roads.

Click HERE to read more

Article Written by : Designmena

Image courtesy of : From Designmena

Source : Designmena

UN Global Efficient Lighting Forum held in Beijing

Beijing hosted a global energy-saving forum from Monday to Tuesday, bringing together governments, the private sector, financial institutions and international agencies to reaffirm their commitment to implementing a worldwide transition to energy efficient lighting.

The Global Efficient Lighting Forum was spearheaded by the United Nations Environment Program (UNEP) and inspired by the United Nations Secretary General’s Sustainable Energy for All (SE4ALL) initiative, which prioritized lighting as one of its five energy efficiency accelerators. Among the various measures, investing in efficient lighting instead of building new power plants is the cleanest, fastest and most cost-effective way to reduce climate change, the UNEP said.

UNEP estimates that replacing all inefficient on-grid lighting globally with innovative, energy-efficient alternatives would result in over 1,000 terawatt hours (TWh) of electricity savings annually, which is equivalent to the annual use of India and the United Kingdom combined. This electricity savings is equivalent to over 120 billion U.S dollars in avoided electricity bills and the reduction of over 530 million tonnes of CO2 annually.

LED lighting and digital control systems are revolutionizing lighting services by delivering improved levels of energy efficiency to all sectors. If there were a global transition to LED, it would reduce electricity consumption by 1550 TWh worldwide, which could provide 1.5 billion household with electricity. Representatives attending the forum have reached an agreement to double the global rate of energy efficiency and make sustainable energy for all a reality by 2030.

The forum was hosted by the Global Efficient Lighting Centre (GELC)-UNEP Collaborating Centre, with support from China’s National Development and Reform Commission, Industry and Information Technology Ministry, and the government of Beijing Municipality.

Click HERE read the original article

Article Editor by: Du Mingming、Yao Chun

The United Nations Environment Programme (UNEP)-Global Environment Facility (GEF): Website

Source: People’s Daily

Time to Switch Approach to Light Pollution

With the continued development of civilisation around the world, there are fewer places left where the skies are completely unaffected by light pollution.

Some lighting manufacturers are becoming increasingly aware of the issue of light pollution, as are property owners and developers in the Middle East.

In Abu Dhabi, the environmental services team at the Tourism Development & Investment Company (TDIC) monitors and audits properties on Saadiyat Island so that lights do not cause endangered Hawksbill sea turtles to head away from the sea and in the wrong direction.

During nesting season, for example, lighting at night is dimmed to facilitate in the conservation of baby turtles that hatch along Saadiyat Beach.

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Written by: Neil Parmar

Source: The National

Light Pollution Blocks Stars and also a Danger to Your Health

On a beautiful clear night, you might enjoy going out and look up at the stars but you may not be seeing as many stars as you could be.

It’s called light pollution, it’s an effect caused by bright lights blocking out the view of the night sky.

You may think that’s only a big city problem but it’s not.

Shanil Virani is the director of the JMU Planetarium.
He is expressing his concern about there being too many lights.
Virani says, “If you’ve ever seen the earth at night you are seeing lights from cities, being sent directly up. It’s a waste of money, it’s a waste of energy, and by many studies it amounts to several billion dollars worth of wasted light. ”

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Written by: Aubrey Urbanowicz

Source: WHSV

Bringing Back The Night: The Fight Against Light Pollution

Last month, France — including the City of Light — grew darker late at night as one of the world’s most comprehensive lighting ordinances went into effect.

From 1 a.m. to 7 a.m., shop lights are being turned off, and lights inside office buildings must be extinguished within an hour of workers leaving the premises. The lighting on France’s building facades cannot be turned on before sunset. Over the next two years, regulations restricting lighting on billboards will go into effect. These rules are designed to eventually cut carbon dioxide emissions by 250,000 tons per year, save the equivalent of the annual energy consumption of 750,000 households, and slash the country’s overall energy bill by 200 million Euros ($266 million).

But no less a motivation, says France’s Environment Ministry, is to “reduce the print of artificial lighting on the nocturnal environment” — a powerful acknowledgement that excessive use of lighting in many parts of the world is endangering our health and the health of the ecosystems on which we rely. The good news, however, is that light pollution is readily within our grasp to control.

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Source: The Guardian

Saving the Night: Light Pollution a Serious Concern for Human Health and Wildlife

Have you ever wondered why our galaxy is called the Milky Way?

Thousands of years ago the ancient Greeks looked up at the mass of stars that stretched across our sky and, believing it looked like flowing milk across the darkness, called it galaxies kuklos, meaning the “milky circle.” Later the Romans called it via lactea, meaning the “milky road.”

However, look up on a given night and, if you’re like two-thirds of the population, you’ll wonder just what it was those Greeks and Romans were looking at.

The reason we don’t see the stars is due to light pollution. And you have Thomas Edison and his popularization of the handy electric light bulb to thank for that.

The light bulb has not only led to longer working hours, but also has changed the black sky of night to one with a dull orange glow, devoid of stars.

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Written by: Nicole Mortillaro

Source: Global News

Global Explorers and The Night Sky

Since the beginning of mankind, people of all cultures have looked up to the star-filled night sky to contemplate life’s greatest questions—Where do we come from? Why are we here? Where are we going? Humanity has always observed the night sky for both personal, introspective purposes and for intellectual purposes. The night sky resource has shaped the world’s cultures, our current knowledge of sciences, philosophies, religions, and our general conception of the universe. It is a universal cultural and natural resource, a key connection between each of us and the natural world that links us to a distant past.

Light Pollution
Up until about 50 years ago, most people could step outside anywhere and see countless stars at night. This is no longer the case for most Americans due to light pollution; according to a recent study, only 1/3 of the American and European population can see the Milky Way. Light pollution, the wasted light that escapes skyward from our streetlights, porch lights, and other bright places, makes stargazing harder, but it also impacts nature—by disrupting wildlife breeding, navigation, and migration cycles.

Click here to read the full article and see the video.

Source: Global Explorers

New Video Highlights Importance of Dark Skies

The International Dark-Sky Association in collaboration with Loch Ness Productions, a U.S.-based fulldome show production company, announces the availability of a new free-for-download video highlighting the issues regarding light pollution. It’s called “Losing the Dark.”

The 6.5-minute public service announcement is being distributed as a fulldome video for digital planetarium theaters, and as a high-definition video for use in traditional planetarium theaters, science centers, classrooms, and streaming from the Web.

Click here to watch the video and read the rest of the article