circadian rhythms Archives - All Things Lighting® Association https://www.allthingslighting.org/tag/circadian-rhythms/ Illuminating the Complicated! Mon, 16 Oct 2023 06:58:11 +0000 en-US hourly 1 https://www.allthingslighting.org/wp-content/uploads/2023/08/cropped-ATLA-favicon2-32x32.jpg circadian rhythms Archives - All Things Lighting® Association https://www.allthingslighting.org/tag/circadian-rhythms/ 32 32 Melanopic Green https://www.allthingslighting.org/melanopic-green/ https://www.allthingslighting.org/melanopic-green/#respond Tue, 12 Nov 2019 19:03:50 +0000 https://www.allthingslighting.org/?p=1206 Ian Ashdown, P. Eng. FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 18/09/03 Numerous medical studies have shown that exposure to blue light at night suppresses the production of melatonin by the pineal gland in our brains and so disrupts our circadian rhythms. As a result, we may have difficulty sleeping. It is therefore only common […]

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]]> https://www.allthingslighting.org/melanopic-green/feed/ 0 Seeing Ultraviolet https://www.allthingslighting.org/seeing-ultraviolet/ https://www.allthingslighting.org/seeing-ultraviolet/#respond Fri, 15 Feb 2019 22:34:31 +0000 https://www.allthingslighting.org/?p=276 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2015/10/26 UPDATE 15/11/08 – The following text briefly notes that some people can see near-ultraviolet radiation following cataract surgery due to the UV transmittance of their artificial intraocular lens. An example of this is reported in considerable detail here. What does it mean […]

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]]> https://www.allthingslighting.org/seeing-ultraviolet/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 Entraining Circadian Rhythms https://www.allthingslighting.org/entraining-circadian-rhythms/ https://www.allthingslighting.org/entraining-circadian-rhythms/#respond Fri, 15 Feb 2019 21:13:13 +0000 https://www.allthingslighting.org/?p=236 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published:  2015/04/21 There is a fascinating research paper called “Colour as a Signal for Entraining the Mammalian Circadian Clock” that has just been published in the open access journal PLOS Biology (Walmsley et al. 2015). While it is an exceedingly technical paper, the basic premise […]

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