Architecture Archives - All Things Lighting® Association https://www.allthingslighting.org/category/academic-articles-and-research/architecture/ Illuminating the Complicated! Tue, 13 Aug 2024 07:32:49 +0000 en-US hourly 1 https://www.allthingslighting.org/wp-content/uploads/2023/08/cropped-ATLA-favicon2-32x32.jpg Architecture Archives - All Things Lighting® Association https://www.allthingslighting.org/category/academic-articles-and-research/architecture/ 32 32 Visual Glare and CIE 117-1995 – NEMA White Paper https://www.allthingslighting.org/visual-glare-and-cie-117-1995-nema-white-paper/ https://www.allthingslighting.org/visual-glare-and-cie-117-1995-nema-white-paper/#respond Wed, 13 Oct 2021 00:18:13 +0000 http://test.allthingslighting.org/?p=2308 The CIE Unified Glare Rating (UGR) metric has been use by the architectural lighting industry since it was first published by the CIE a quarter-century ago (CIE 117-1995, Discomfort Glare in Interior Lighting). Originally popularized by European lighting manufacturers, UGR has recently been adopted by the DesignLights Consortium, the US Green Building Council (LEED), and […]

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]]> https://www.allthingslighting.org/visual-glare-and-cie-117-1995-nema-white-paper/feed/ 0 Designing an Ultraviolet-C Disinfection System https://www.allthingslighting.org/designing-an-ultraviolet-disinfection-system/ https://www.allthingslighting.org/designing-an-ultraviolet-disinfection-system/#respond Tue, 09 Jun 2020 22:59:59 +0000 https://www.allthingslighting.org/?p=1811 Recent germicidal light sources include UV-C light-emitting diodes and pulsed xenon discharge lamps, but there is a newcomer on the block that has gained considerable media attention: far-ultraviolet excimer lamps. What does it take to design a UV-C disinfection system using far-UV radiation?

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]]> https://www.allthingslighting.org/designing-an-ultraviolet-disinfection-system/feed/ 0 Circadian Lighting – An Engineer’s Perspective https://www.allthingslighting.org/circadian-lighting-an-engineers-perspective/ https://www.allthingslighting.org/circadian-lighting-an-engineers-perspective/#respond Fri, 15 Nov 2019 01:00:51 +0000 https://www.allthingslighting.org/?p=1254 Ian Ashdown, P. Eng, FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 19/11/14. Whether you call it “circadian lighting,” “biologically effective lighting” or some other name, the principle is the same: the color and intensity of light can be used to regulate the timing of our biological clocks, or “circadian rhythms.” For architects and lighting designers, […]

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]]> https://www.allthingslighting.org/circadian-lighting-an-engineers-perspective/feed/ 0 Understanding Mesopic Photometry https://www.allthingslighting.org/understanding-mesopic-photometry/ https://www.allthingslighting.org/understanding-mesopic-photometry/#respond Fri, 15 Feb 2019 22:56:14 +0000 https://www.allthingslighting.org/?p=288 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2013/10/08  If you are involved with outdoor area or roadway lighting design, you will undoubtedly encounter such terms as mesopic multipliers, scotopic lumens, and S/P ratios, and you will sooner or later need to consider mesopic photometry in your design efforts. For example, you […]

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]]> https://www.allthingslighting.org/understanding-mesopic-photometry/feed/ 0 Thoughts on Color Rendering https://www.allthingslighting.org/thoughts-on-color-rendering/ https://www.allthingslighting.org/thoughts-on-color-rendering/#respond Fri, 15 Feb 2019 22:52:55 +0000 https://www.allthingslighting.org/?p=286 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2014/01/05 UPDATE 14/10/06 – LightingEurope, the “Voice of the Lighting Industry,” has just published their LightingEurope Position Paper on Color Quality. To summarize: LightingEurope supports to continue the use of the existing Color Fidelity metric CRI including eight reference colors. LightingEurope supports to […]

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]]> https://www.allthingslighting.org/thoughts-on-color-rendering/feed/ 0 The Kruithof Curve https://www.allthingslighting.org/the-kruithof-curve/ https://www.allthingslighting.org/the-kruithof-curve/#respond Fri, 15 Feb 2019 22:50:02 +0000 https://www.allthingslighting.org/?p=284 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.  Published: 2015/01/12 UPDATE 16/04/09 – This metastudy: Fotois, S. 2106. “A Revised Kruithof Graph Based on Empirical Data,” Leukos. (Published online 08 April 2016, DOI 10.1080/15502724.2016.1159137.) critically examined 29 studies in which the Kruithof curve was investigated. The author concluded that “… these [studies] do […]

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]]> https://www.allthingslighting.org/the-kruithof-curve/feed/ 0 Sports Lighting Regulations https://www.allthingslighting.org/sports-lighting-regulations/ https://www.allthingslighting.org/sports-lighting-regulations/#respond Fri, 15 Feb 2019 22:43:52 +0000 https://www.allthingslighting.org/?p=282 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2016/04/30  This blog article has a somewhat frustrating history. About a year ago, I was asked to volunteer my time to write a primer of light and color as it relates to sports lighting regulations. I was told the name of the organization I […]

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]]> https://www.allthingslighting.org/sports-lighting-regulations/feed/ 0 Kruithof Revisited https://www.allthingslighting.org/kruithof-revisited/ https://www.allthingslighting.org/kruithof-revisited/#respond Fri, 15 Feb 2019 21:43:11 +0000 https://www.allthingslighting.org/?p=258 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2015/11/24 A previous blog article — The Kruithof Curve — examined the history of the Kruithof curve (Kruithof 1941]) shown in FIG. 1: To summarize the article, “The Kruithof curve itself was thoroughly debunked a quarter-century ago with three exhaustive studies involving up to […]

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]]> https://www.allthingslighting.org/kruithof-revisited/feed/ 0 Giving Light https://www.allthingslighting.org/giving-light/ https://www.allthingslighting.org/giving-light/#respond Fri, 15 Feb 2019 21:23:17 +0000 https://www.allthingslighting.org/?p=244 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2014/05/12 Giving light … this phrase symbolizes a new philosophy of lighting design, a philosophy in the sense of how we think about the lighting design process. Much like the modernist movement in architectural design a century ago, it offers a reconciliation of lighting […]

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]]> https://www.allthingslighting.org/giving-light/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 Climate-Based Daylight Modeling https://www.allthingslighting.org/climate-based-daylight-modeling/ https://www.allthingslighting.org/climate-based-daylight-modeling/#respond Fri, 15 Feb 2019 00:58:29 +0000 https://www.allthingslighting.org/?p=186  Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published:  2016/03/26 daylight, n. The light of day. Apart from having a wonderfully circular definition in most English-language dictionaries, daylight really is just another form of illumination. As such, most people would expect lighting designers to be able to simulate daylight with the same ease […]

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]]> https://www.allthingslighting.org/climate-based-daylight-modeling/feed/ 0 Blue Light Hazards and Television https://www.allthingslighting.org/blue-light-hazards-and-television/ https://www.allthingslighting.org/blue-light-hazards-and-television/#respond Wed, 13 Feb 2019 00:05:55 +0000 https://www.allthingslighting.org/?p=94 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.  Published: 2017/05/19  If you have grandchildren, you may be old enough to remember “black and white” (that is, monochrome) televisions sets with rabbit ear antennae and some of the worst children’s television programming that has ever been produced. Iconic programs such as Captain Kangaroo, Mighty […]

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]]> https://www.allthingslighting.org/blue-light-hazards-and-television/feed/ 0 Blue Light Hazard… Or Not? https://www.allthingslighting.org/blue-light-hazard-or-not/ https://www.allthingslighting.org/blue-light-hazard-or-not/#respond Tue, 12 Feb 2019 03:03:21 +0000 https://www.allthingslighting.org/?p=51 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2014/11/05 As a professional lighting designer, you will likely have read about the “blue light hazard” associated with white light-emitting diodes. You will have seen warnings like this (Willmorth 2014a): “… long term exposure to blue light at 441nm caused lesions on the […]

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