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This comes with a rather unique set of challenges, because what is polluting for one person can be acceptable or even desirable lighting for another. There are uses of light that are necessary at night, especially in cities; no ‘dark sky advocate’ would deny that. And there are obvious instances of excessive brightness and poorly designed lighting, which most reasonable people would agree is unnecessary and wasteful. But, there will also be instances that fall somewhere in an intermediary, gray area. These could be instances where the lighting does not obviously fall into one of the sub-categories of light pollution, or does not relate directly to one of the identified effects of light pollution, or is contested as a good by some stakeholders and a nuisance or excess by others. Or, it could be a new technological innovation that reduces energy consumption but will potentially increase skyglow—an emerging issue connected to LEDs (Morgan-Taylor, 2014 Morgan-Taylor, M. (2014). Regulating light pollution in Europe: Legal challenges and ways forward. In J. Meier, U. Hasenöhrl, K. Krause, & M. Pottharst (Eds.), Urban lighting, light pollution and society (pp. 159–176). New York, NY: Taylor & Francis. [Google Scholar]). In these instances, we will see the weighing of benefits versus negative effects by regulatory decision-makers. It is unclear how the current conception of light pollution can be used to resolve such conflicts, without drawing upon a larger moral framework—for example, a formulation of the precautionary principle, a definition of sustainable development, or perhaps an explicit focus on minimizing energy usage—that helps to elucidate exactly what an acceptable level of pollution is. And, different approaches may rely on rights-based or consequentialist moral frameworks. These may, in turn, offer different boundary conditions for what qualifies as acceptable levels of light pollution. For example, in 2007, a group of astronomers published the Starlight Declaration, asserting that access to the night sky should be an ‘inalienable right of humankind’ (Starlight Initiative, 2007 Starlight Initiative. (2007). Declaration in defence of the night sky and the right to starlight. La Palma: La Palma Biosphere Reserve. Retrieved 14 January, 2015, from [Google Scholar], p. 3). Adopting such a rights-based approach would likely yield different conclusions than, say, a cost-benefit analysis. We would then need to ask if light pollution is, or should be, beholden to one broader moral framework, or how different manifestations can be reconciled. If we recall the discussion of defining problems within policy as a means to guide action (Stone, 2002 Stone, D. (2002). Policy paradox: The art of political decision making. New York, NY: W. W. Norton & Company Inc. [Google Scholar]), the concept of light pollution therefore requires further parameters beyond the causes and effects listed above. A common criticism of full cutoff lighting fixtures is that they are sometimes not as aesthetically pleasing to look at. This is most likely because historically there has not been a large market specifically for full cutoff fixtures, and because people typically like to see the source of illumination. Due to the specificity with their direction of light, full cutoff fixtures sometimes also require expertise to install for maximum effect. This paper has critically engaged with the concept of light pollution and identified areas that require further clarification. The limitation of light pollution as a criterion for the moral evaluation of artificial nighttime lighting was discussed, concluding that it can best function in the limited capacity of mitigation or preservation efforts. This led to practical concerns, specifically the ambiguity of thresholds for acceptable levels of light pollution, and the mechanisms that could be used to establish said thresholds. The intention was to highlight conceptual and practical issues that, if addressed, can help to strengthen future regulatory efforts in urban nighttime lighting. About 1.7 billion people or more than a fifth of the world’s population are without access to electricity and modern lighting. The problem is most severe in rural areas or on the fringes of cities. , however the extent to rural electrification varies widely from country to country.  For example, 90% of Africa is not served by grid electricity versus 20% of Mexico. In fact, some African countries, for example, Rwanda and Burundi have barely passed the 1% electrification threshold! Solution number seven invokes common time conventions in astronomy (Newton 2001; Lisle 2010). In 1987, astronomers observed a supernova in a small, nearby galaxy, the Large Magellanic Cloud (LMC), so we say that the supernova happened in 1987 (the name, “SN 1987A,” says as much). However, this was when we first saw the light from the supernova, but since the Large Magellanic Cloud is roughly 170,000 lt-yr away, we can say that the supernova actually happened 170,000 years ago. Thus, astronomers have two time conventions as to when something happened, when it actually happened, and when it is observable on earth. In the time convention solution, God made objects in the universe on Day Four, but the one-way infinite speed of light caused their light to reach earth instantly. It is amazing to me that this very interesting solution has not received more attention, particularly of the negative type. To solve the starlight problem, some creationists have proposed a change in the speed of light; this proposition became known as c-decay. The idea was first systematically advanced by creationist Barry Setterfield in his 1981 book The Velocity of Light and the Age of the Universe. Setterfield claimed that, at the date of creation, light traveled millions of times faster than it does today and has been decaying precipitously ever since (until it stopped at its present value coincidentally with the ability to detect small changes). This idea is fundamentally absurd and since its inception has been universally derided by scientists. The idea was supported into the late eighties by creationists whose claims became more and more bizarre in attempts to prop up their failing model, until it finally collapsed under the weight of the evidence against it. In 1988, the idea was given up by the major creationist organization Institute for Creation Research, which, in an attempt to distance themselves from the scientific debacle that c-decay had become, became vocal critics of it.[5] Outdoor Area Light – An outdoor light, typically on private property, that is maintained by the electric company and leased to the customer. 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. If blue light does have adverse health effects, then environmental concerns, and the quest for energy-efficient lighting, could be at odds with personal health. Those curlicue compact fluorescent lightbulbs and LED lights are much more energy-efficient than the old-fashioned incandescent lightbulbs we grew up with. But they also tend to produce more blue light. Street light replacement project – We’re investing in a £25 million capital project to update and replace thousands of street lights across the town. New LED streetlights have a small box on top of each column that flash a very small red and blue light. Please do not report any streetlights found to have these on, as this is to confirm that they are connected to our central management system. The light provided by a kerosene lamp is not very bright and is highly inefficient. Each kerosene lantern produces about 0.2% of the light that one would get for the same price in industrialized countries – about 2 to 4 lumens compared to 900 lumens produced by a 60 watt bulb. Dear sir, Good evening i want to know where the backlight settings that will make the key pad light to show on my Techno phone?. Dear Eng : Plis help me to repair tecno N6s lights by jumper Witam zakupiłem jakiś czas temu grę dying light Przez jakiś czas grało mi się dobrze na średnich ustawieniach ale po aktualizacji avasta zaczęły się lagi gra chodzi płynie na najniższych ustawieniach i w którymś momencie zaczynają się lagi a przy zmianie borni w ekwipunku gra się “kraszuje”. Przeinstalowałem grę jak i avasta ale problem jest dalej. Sprzęt Procesor-intel pentium G3420 Grafika- asus HD7790-DC2OC-2GD RAM-DDR3 8gb Wolne miejsce na dysku to 130gb Proszę o pomoc Anabolic Rx24 VigRX Plus mochoman Celuraid Muscle eracto erozon max machoman Atlant Gel Tonus Fortis VigRX Plus