LED Streetlights Save Energy, but Could Have Some Serious Side Effects. By Zoe Loftus-Farren – March 10, 2014 Exposure to blue-rich LED lights can disrupt natural circadian rhythms in humans and wildlife This post has been updated to include information about San Francisco's choice of yellow-rich LEDs. Streetlights don’t make a lot of headlines. They are a constant in our cityscapes, rarely drawing the attention of passing pedestrians and motorists. Photo by flickr user meltedplasticLED street lights on a Houston, TX residential street. LEDs definitely bring some benefits, the biggest of which is energy savings. That is, until recently. The hype around LEDs stems from two primary benefits. Public safety was a big motivator behind the Oakland conversion project, and it may seem intuitive that brighter lights improve safety.
In terms of the environment, LEDs definitely bring some benefits, the biggest of which is energy savings. Similarly, Berkeley and San Francisco estimate that new LED streetlights will consume 50 percent less energy than existing streetlights. Projecto internacional da UA mostra vantagens <br> da iluminação pública inteligente com LED. A solução proposta apresenta um sistema de iluminação pública inteligenterecorrendo a dispositivos de estado sólido, nomeadamente Díodos Emissores de Luz (LED, do inglês “Light Emitting Diode”), de forma a reduzir o consumo energético.
O dispositivo LED por si só permite atingir níveis de eficiência energética superiores ao de outros dispositivos de iluminação convencionais, como as lâmpadas de descarga de alta intensidade e lâmpadas de iodetos metálicos, muito em voga nos sistemas de iluminação pública. No entanto, melhores retornos económicos serão possíveis se ao LED for aliada alguma inteligência.
Esta possibilidade assenta nas características intrínsecas dos dispositivos LED que, sendo dispositivos de estado sólido, possibilitam formas de controlo mais eficientes do que as utilizadas noutros dispositivos convencionais. O elemento central da solução reside no escurecimento ativo e dinâmico da luz em função das condições ambiente. IDA. Losing the Dark has no license fee! The show has been rendered in many formats and languages — just go to the fulldome or flat screen downloads page. If downloading is not a viable option (for example, the movie files are too big for efficient downloading, and for theaters requiring frames to encode or slice their own movies), Loch Ness can ship the fulldome show on a USB drive. There is a minimal cost for this, outlined on the Prices / Ordering page. The show is also available directly from selected fulldome vendors whose systems use proprietary encoding. In addition to the fulldome version for digital planetarium use, we have rendered Losing the Dark as a conventional flat screen video.
Loch Ness Productions and the International Dark-Sky Association are pleased and proud to make Losing the Dark available to planetarium theaters, educators, and viewers around the world! If we all work together, we can bring back the dark of night to planet Earth. the Fred Maytag Family Foundation. Starlight Declaration - La Palma 2007. The participants of the International Conference in Defense of the Quality of Night Sky and the right to observe stars, jointly with the representatives of UNESCO, UNWTO, IAU, other international agencies named in the longer version, and members of the academic community, meeting in La Palma, Canary Islands, Spain, on 19 and 20 of April 2007, are aware that the Starlight vista has been and continue to be an inspiration of the mankind, and that its contemplation represents an essential element in the development of scientific thoughts in all civilizations.
Therefore, it is declared that: a. An unpolluted night sky that allows the enjoyment and contemplation of the firmament should be considered an inalienable right equivalent to all other socio-cultural and environmental rights. Hence the progressive degradation of the night sky must be regarded as a fundamental loss. b. D. C. E. F. The Sodium Lamp - How it works and history. Sodium Lamp High lumen output at high efficiency (1920 - Today) Sodium Lamps were first produced commercially by Philips in Holland in 1932. There are two kinds of sodium lights: Low Pressure (LPS) and High Pressure (HPS). These lamps are mostly used for street lighting as well as industrial uses.
The lamp works by creating an electric arc through vaporized sodium metal. THE LOW-PRESSURE SODIUM LAMP The LPS lamp was the first sodium lamp to be developed. An LPS with it's yellow glow Argon has a lower glow voltage, argon helps the smaller lamps start at a lower voltage. Low pressure sodium lamps were invented first in 1920 by Arthur H. High Pressure Sodium Lamp (HPS Lamp) The HPS lamp is the most ubiquitous lamp for street lighting on the planet. 1. The HPS lamp consists of a narrow arc tube supported by a frame in a bulb. Maintaining a vacuum is difficult, oxygen and other gasses can seep in over time.
Louden, Schmidt and Homonnay with a prototype light Back to Top COMMENTS? Back to Home. Mais de dez mil pessoas subiram ao Pico em 2013. No ano passado registaram-se mais de dez mil subidas ao Pico, nos Açores, a mais alta montanha de Portugal, representando um acréscimo de cerca de 30% face a 2012. Em 2013 foi alargado a todo o ano, pela primeira vez, o funcionamento do sistema de rastreio de visitantes na Reserva Natural da Montanha do Pico, devido a uma parceria de cooperação estabelecida entre o Governo Regional dos Açores e a Associação Humanitária de Bombeiros Voluntários da Madalena. No âmbito deste protocolo, será reforçado o sistema de rastreio por GPS com a aquisição de mais 40 unidades, que serão utilizadas pelos visitantes na subida à montanha do Pico. Este sistema de monitorização permite agilizar os mecanismos de resgate, em caso de necessidade.
O grau de dificuldade do trilho, as frequentes mudanças meteorológicas e os largos períodos de visibilidade reduzida fazem com que exista um risco associado a este percurso escalável por trilhos marcados ou por serviço de um guia. Recursos | Dark Skies Rangers – Portugal. Poluição luminosa – Adota uma rua e salva uma estrelinha Auditoria à iluminação pública (ficheiro Excel para os cálculos da auditoria) Ver ou não ver, eis a questão… Como é que a poluição luminosa afeta as estrelas Stellarium – Relacionar a magnitude com a poluição luminosa Stellarium – Manual de instruções Stellarium. Fulldome Database | Losing the Dark. Dark Skies Awareness: Starlight Reserves. A Starlight Reserve is a site where a commitment to defend the night sky quality and the access to starlight has been established.
Its main function will be to preserve the quality of the night sky and its associated values, being them cultural, scientific, astronomical, natural, or landscape-related. A Starlight Reserve will have a core or dark zone. This is an unpolluted area where natural night sky light conditions are kept intact. This core zone will be protected by a buffer or protection zone to avoid the adverse effects of air and light pollution reaching the core zone. Finally, an external zone where criteria of intelligent and responsible lighting will be enforced, protecting night sky quality from other harmful factors such as air pollution. The objectives and functions of Starlight Reserves are guided by the principles contained in the Declaration in Defence of the Night Sky and the Right to Starlight. CATEGORIES SL Reserves Related programs IDSCommunities, Parks, and Reserves.
LED streetlamp aims to improve public's view of stars. 25 April 2013Last updated at 13:14 ET By Leo Kelion Technology reporter Light pollution prevents nearby residents from being able to see many of the stars in the night sky Researchers believe they have come up with a new type of LED-powered streetlamp that could radically reduce light pollution. Current designs "leak" large amounts of light in unwanted directions, obscuring views of the stars, wasting energy and making it harder for drivers to see. The team, based in Mexico and Japan, said they believed their solution was the "best ever reported". However, they have yet to turn their theory into a working prototype.
The study - carried out by scientists in Mexico and Taiwan - appears in the open-access journal Optics Express. LED lens According to the researchers, conventional street lamps - which use high-pressure sodium or mercury vapour - scatter up to 20% of their energy horizontally or vertically because it is difficult to control their beams. LED revolution. Save Our Sky and Win! | Galileo Teachers Training Program. The second consecutive Dark Skies Rangers contest kicks off to inspire and make awareness of the importance of the dark skies. Our planet, seen from the International Space Station, looks like a Christmas tree. This light, visible from space, is called “light pollution” caused by street illumination that project the light to all directions, diminishing greatly the darkness of the night sky.
Light Pollution is a global problem that we have to fight for. It contributes to a major waste of both energy and money, influence the climate change, affects living beings, prevents people from enjoying the beauty of the sky and disturb astronomical observations. Megoliths and star trails in the Alqueva Dark Sky Reserve in Portugal. Winners of the each category will receive a week in the Alqueva Dark Sky Reserve (Portugal), a tablet and a smartphone. Globe at Night - Dark Skies and Energy Education. Dark Skies Rangers Dark Skies and Energy Education Activities Articles Dark Skies Rangers Resources Globe at Night Resources International Dark Sky Association Resources Globe at Night is a program of the National Optical Astronomy Observatory, the national center for ground-based nighttime astronomy in the United States, operated by the Association of Universities for Research in Astronomy (AURA), under cooperative agreement with the National Science Foundation.
International Dark Sky Reserves. International Dark Sky Reserves Three tiers designate the quality of night skies the reserve is recognized for. Gold represents the highest award representing the darkest skies, followed by the Silver and Bronze designations. Requirements for each of the designations are shown in the table below. The International Dark-Sky Association continues to accept applications from reserves wishing to join in the ranks of the highest prestige for nighttime visages. If you are interested in applying or learning more about the process please fill out this form. Download the Guidelines Download the IDA-RASC-Guidelines for Outdoor Lighting Release of Updates to IDSPlaces Guidelines Updated guidelines for communities, parks, and reserves have been released.
If you are interested in developing or are currently developing an application for a location we encourage you to consider these new guidelines. As part of the new guidelines bi-monthly submission deadlines will be set. Submission Deadline Dates: Starlight Tourist Destinations. Starlight Destinations are visitable places characterised by excellent quality for the contemplation of starry skies and the practice of tourist activities based on this resource. The Starlight Tourism Certification System was created with the aim of encouraging, at world-wide level, the improvement of the quality of tourist experiences and the protection of the night skies in Starlight Destinations.The Starlight Certification seeks to guarantee the capacity to enjoy the view of the stars and to discover the associated scientific, cultural, natural and scenic values.
The Starlight Certification makes it possible for the first time to bring science and tourism together, It aims to ensure the quality of tourism experiences involving the nightscapes, the view of stars and the cosmos and the related scientific, cultural and environmental knowledge. Recognition of science as a tourist product and, at the same time, as a working method in tourism, is the foundation of developing this standard.
Casa Saramago de Monsaraz - Reserva Dark Sky. A região Monsaraz é um dos locais abrangidos pela reserva Dark Sky. Um desses lugares é o Grande Lago Alqueva, o primeiro sítio no mundo a receber a certificação "Starlight Tourism Destination", apoiada pela UNESCO, OMT e IAC. É um lugar maravilhoso, com céu escuro, noites claras e antigos megalitos astronómicos. A Casa Saramago é uma casa aderente a este projeto. Losing the Dark: A Video about Light Pollution. If you were going to make a video about light pollution and its effects on people, and it could only be five or six minutes long, what would you tell people?
There are so many aspects to the issue of light pollution that it's very tough to pick out just a few facts to impress on viewers. That was the challenge a group of us faced as we set out to create our newly released 6.5-minute video called "Losing the Dark. " A frame from the title sequence of Losing the Dark. CREDIT: Loch Ness Productions. The project was inspired by a conversation between Dr. Connie Walker and a planetarium person in Portugal. That led to a meeting between my company Loch Ness Productions and the Education Committee of the International Dark-Sky Association, headed by Dr. The committee wanted to show the effects of light pollution on the wilderness as well as in urban locales. A still frame from Losing the Dark showing the glow of traffic and city lights in Chicago. Starlight Declaration - La Palma 2007.
About IDA. LEDs: Light Pollution Solution or Night Sky Nemesis? Assets/Night_Sky_Conservation/Reserves/Kerry/Kerry_IDSR_PR.pdf. The Sodium Lamp - How it works and history. Dark Sky Meter Lite - Dark Sky Meter. Céu mais escuro do país "aberto" para observações astronómicas. Dark Skies Rangers – Portugal | Vamos apagar as luzes para acender as estrelas!