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The use of full cutoff lighting fixtures, as much as possible, is advocated by most campaigners for the reduction of light pollution. It is also commonly recommended that lights be spaced appropriately for maximum efficiency, and that number of luminaires being used as well as the wattage of each luminaire match the needs of the particular application (based on local lighting design standards). A newer method for predicting and measuring various aspects of light pollution was described in the journal Lighting Research Technology (September 2008). Scientists at Rensselaer Polytechnic Institute’s Lighting Research Center have developed a comprehensive method called Outdoor Site-Lighting Performance (OSP), which allows users to quantify, and thus optimize, the performance of existing and planned lighting designs and applications to minimize excessive or obtrusive light leaving the boundaries of a property. OSP can be used by lighting engineers immediately, particularly for the investigation of glow and trespass (glare analyses are more complex to perform and current commercial software does not readily allow them), and can help users compare several lighting design alternatives for the same site.[100] Stray light, in the sky or elsewhere, is wasted light – it is not needed for and does not help visibility. It is really a mistake that it is there. Why does it happen? Please note that the selected light will not change colour once reported. The check engine light is part of your car’s so-called onboard diagnostics system. Since the 1980s, computers increasingly have controlled and monitored vehicle performance, regulating such variables as engine speed, fuel mixture, and ignition timing. In modern cars, a computer also tells the automatic transmission when to shift. If an outdoor lighting pole is broken, please call Xcel Energy Customer Care at 1-800-895-4999. (Except in Minnesota; continue form submission) Light clutter refers to excessive groupings of lights. Groupings of lights may generate confusion, distract from obstacles (including those that they may be intended to illuminate), and potentially cause accidents. Clutter is particularly noticeable on roads where the street lights are badly designed, or where brightly lit advertising surrounds the roadways. Depending on the motives of the person or organization that installed the lights, their placement and design can even be intended to distract drivers, and can contribute to accidents. Several different types of light sources exist, each having different properties that affect their appropriateness for certain tasks, particularly efficiency and spectral power distribution. It is often the case that inappropriate light sources have been selected for a task, either due to ignorance or because more sophisticated light sources were unavailable at the time of installation. Therefore, badly chosen light sources often contribute unnecessarily to light pollution and energy waste. By re-assessing and changing the light sources used, it is often possible to reduce energy use and pollutive effects while simultaneously greatly improving efficiency and visibility. In contrast to old-fashioned incandescent light bulbs used in sodium vapor streetlights, LEDs do not possess filaments that burn out, nor do they get very warm. Because of their improved quality and lower cost, LEDs are now gradually replacing conventional streetlights for outdoor lighting in communities around the world. Good news, right? In certain cases an over-illumination lighting technique may be needed. For example, indirect lighting is often used to obtain a “softer” look, since hard direct lighting is generally found less desirable for certain surfaces, such as skin. The indirect lighting method is perceived as more cozy and suits bars, restaurants and living quarters. It is also possible to block the direct lighting effect by adding softening filters or other solutions, though intensity will be reduced. Report a problem with a street light Medical research on the effects of excessive light on the human body suggests that a variety of adverse health effects may be caused by light pollution or excessive light exposure, and some lighting design textbooks[34] use human health as an explicit criterion for proper interior lighting. Health effects of over-illumination or improper spectral composition of light may include: increased headache incidence, worker fatigue, medically defined stress, decrease in sexual function and increase in anxiety.[35][36][37][38] Likewise, animal models have been studied demonstrating unavoidable light to produce adverse effect on mood and anxiety.[39] For those who need to be awake at night, light at night also has an acute effect on alertness and mood.[40] Regarding energy consumption, the past five or six years have seen a slow transformation from garish, peach-colored, high-pressure sodium vapor streetlights — which have long been recognized to be energy-inefficient — to light-emitting diode (LED) streetlights, which use solid-state technology to convert electricity into light.  Light trespass can be reduced by selecting light fixtures which limit the amount of light emitted more than 80° above the nadir. The IESNA definitions include full cutoff (0%), cutoff (10%), and semi-cutoff (20%). (These definitions also include limits on light emitted above 90° to reduce sky glow.) There is a person underneath each of these lights. In the two pictures on the left the person can see you but can you see the person? Are you really safer with more light or is it merely an illusion? Fully shielded light fixtures give you and the other person the same advantage, and minimize trespass and sky glow. The ‘distant starlight problem’ is sometimes used as an argument against biblical creation. People who believe in billions of years often claim that light from the most distant galaxies could not possibly reach earth in only 6,000 years. However, the light-travel–time argument cannot be used to reject the Bible in favour of the big bang, with its billions of years. This is because the big bang model also has a light-travel–time problem. Call it the most misunderstood indicator on your dashboard: The check engine light can mean many different things, from a loose gas cap to a seriously misfiring engine. The below discussion is organized under two broad questions, with the aim of elucidating the moral limitations and practical ambiguities existing within the concept of light pollution, when considered as a framework for moral and political decision-making. These two sections should not be seen as mutually exclusive, but as actively informing one another. There are almost 90,000 City-owned street lights in Calgary. The City has a maintenance contract with Enmax Power Services to investigate concerns and repair street lights. The tendency is for people to say that they feel safer in brightly lit areas, but statistics do not indicate that most crime-plagued areas are made safer by increased lighting. Studies are mixed but there are results indicating increased crime with increased lighting. This may be the result of people feeling safer when they actually aren’t, thus being lulled into taking fewer anti-crime precautions. Your council is responsible for the installation and maintenance of street lights. A recessed light (flush to the ceiling) goes off sometimes and later works again. This is probably its built-in safety “cutout” keeping the light from overheating. It is telling you that the wrong style or wattage of bulb is being used or that ceiling-space insulation is too close around the light. You’re driving along in your car or truck and suddenly a yellow light illuminates on your dash telling you to check or service your engine. If you’re like most car owners, you have little idea about what that light is trying to tell you or how you should react. Access to electricity and poverty are closely linked, countries that have the lowest levels of electrification also have the highest levels of poverty. Without adequate electricity and lighting, adults are unable to continue income generating activities into the evening that may lessen the burden of poverty. At the same time, children are unable to study, read or do school work. Rural communities need a reliable and sustainable solution for lighting to give them hope for a brighter future. In some cases, evaluation of existing plans has determined that more efficient lighting plans are possible. For instance, light pollution can be reduced by turning off unneeded outdoor lights, and only lighting stadiums when there are people inside. Timers are especially valuable for this purpose. One of the world’s first coordinated legislative efforts to reduce the adverse effect of this pollution on the environment began in Flagstaff, Arizona, in the U.S. There, over three decades of ordinance development has taken place, with the full support of the population,[93] often with government support,[94] with community advocates,[95] and with the help of major local observatories,[96] including the United States Naval Observatory Flagstaff Station. Each component helps to educate, protect and enforce the imperatives to intelligently reduce detrimental light pollution. BeMass TestX Core TestX Core Maxman Celuraid Muscle power up premium TestX Core Masculin Active el macho erogan

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