Light Pollution Archives - All Things Lighting® Association https://www.allthingslighting.org/category/academic-articles-and-research/light-pollution/ Illuminating the Complicated! Tue, 13 Aug 2024 23:09:02 +0000 en-US hourly 1 https://www.allthingslighting.org/wp-content/uploads/2023/08/cropped-ATLA-favicon2-32x32.jpg Light Pollution Archives - All Things Lighting® Association https://www.allthingslighting.org/category/academic-articles-and-research/light-pollution/ 32 32 Quantifying Light Pollution Sources https://www.allthingslighting.org/quantifying-light-pollution-sources/ https://www.allthingslighting.org/quantifying-light-pollution-sources/#respond Thu, 03 Feb 2022 08:02:02 +0000 https://www.allthingslighting.org/?p=2658 time light pollution is sadly familiar to all of us. While our grandparents and great-grandparents may talk fondly of seeing the Milky Way in their youth, with thousands of stars scattered across the dark summer sky, we are mostly content with seeing a few dozen stars through the never-ending dusk of urban and suburban skies.

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]]> https://www.allthingslighting.org/quantifying-light-pollution-sources/feed/ 0 Greenhouses and Light Pollution https://www.allthingslighting.org/greenhouses-and-light-pollution/ https://www.allthingslighting.org/greenhouses-and-light-pollution/#respond Wed, 22 Apr 2020 22:09:52 +0000 https://www.allthingslighting.org/?p=1729 Supplemental electric lighting for greenhouses may be essential for extending the growing season in northern climates, but it comes with a not-so-hidden cost: environmental light pollution. The consequences of this pollution may range from irate neighbours in rural areas to municipal bylaws that may prohibit the use of supplemental lighting during certain hours of the […]

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]]> https://www.allthingslighting.org/greenhouses-and-light-pollution/feed/ 0 Mobile Light Pollution https://www.allthingslighting.org/mobile-light-pollution/ https://www.allthingslighting.org/mobile-light-pollution/#respond Fri, 15 Feb 2019 22:19:03 +0000 https://www.allthingslighting.org/?p=268 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2016/01/21 At first glance, this appears to be an innocuous question: How much light pollution is attributable to automotive headlights? It is also a good question in that if we are to address light pollution, we need to know what causes it. For […]

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]]> https://www.allthingslighting.org/mobile-light-pollution/feed/ 0 Light Pollution and Uplight Ratings https://www.allthingslighting.org/light-pollution-and-uplight-ratings/ https://www.allthingslighting.org/light-pollution-and-uplight-ratings/#respond Fri, 15 Feb 2019 22:09:25 +0000 https://www.allthingslighting.org/?p=264 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2015/07/20 “Oh, East is East, and West is West, and never the twain shall meet.” When Rudyard Kipling wrote this line in his poem The Ballad of East and West (Kipling 1892), he was referring to cultural misunderstandings between the British and their […]

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]]> https://www.allthingslighting.org/light-pollution-and-uplight-ratings/feed/ 0 Filtered LEDs and Light Pollution https://www.allthingslighting.org/filtered-leds-and-light-pollution/ https://www.allthingslighting.org/filtered-leds-and-light-pollution/#respond Fri, 15 Feb 2019 21:17:40 +0000 https://www.allthingslighting.org/?p=240 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2016/03/03 UPDATE 2016/03/03 – Revised Figure 6. The problem is astronomical — the blue light emitted by LED roadway luminaires has been shown to contribute to light pollution, especially when cool white LEDs are used. Blue light is preferentially scattered by air molecules, […]

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]]> https://www.allthingslighting.org/filtered-leds-and-light-pollution/feed/ 0 Color Temperature and Outdoor Lighting https://www.allthingslighting.org/color-temperature-and-outdoor-lighting/ https://www.allthingslighting.org/color-temperature-and-outdoor-lighting/#respond Fri, 15 Feb 2019 01:14:00 +0000 https://www.allthingslighting.org/?p=197 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2015/07/22 UPDATE: Sports field lighting analysis added 15/10/12. [An edited version of this article was published as “STREET LIGHTS: Light pollution depends on the light source CCT” in the October 2015 issue of LEDs Magazine.] Most of you will be familiar with the International […]

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]]> https://www.allthingslighting.org/color-temperature-and-outdoor-lighting/feed/ 0 Botanical Light Pollution https://www.allthingslighting.org/botanical-light-pollution/ https://www.allthingslighting.org/botanical-light-pollution/#respond Wed, 13 Feb 2019 01:04:08 +0000 https://www.allthingslighting.org/?p=144 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2016/02/17 Blue-rich light from LED streetlights, we are told, is the nemesis of professional and amateur astronomers. Blue light is preferentially scattered by the atmosphere, resulting in potentially unacceptable levels of light pollution for astronomical observations. Unfortunately, LED streetlights emit more blue light on […]

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