phytochrome Archives - All Things Lighting® Association https://www.allthingslighting.org/tag/phytochrome/ Illuminating the Complicated! Mon, 16 Oct 2023 06:59:03 +0000 en-US hourly 1 https://www.allthingslighting.org/wp-content/uploads/2023/08/cropped-ATLA-favicon2-32x32.jpg phytochrome Archives - All Things Lighting® Association https://www.allthingslighting.org/tag/phytochrome/ 32 32 The Effect of Near-Infrared Radiation on Plants https://www.allthingslighting.org/the-effect-of-near-infrared-radiation-on-plants/ https://www.allthingslighting.org/the-effect-of-near-infrared-radiation-on-plants/#respond Mon, 19 Apr 2021 09:00:25 +0000 https://www.allthingslighting.org/?p=1945 Look at any textbook on botany and you will find this maxim: plants respond to optical radiation in the spectral range of 280 nm to 800 nm. Period, end of discussion. The question is, how was this spectral range (sometimes referred to as Photobiologically Active Radiation, or PBAR) determined? This question addresses issues beyond mere […]

The post The Effect of Near-Infrared Radiation on Plants appeared first on All Things Lighting® Association.

]]> https://www.allthingslighting.org/the-effect-of-near-infrared-radiation-on-plants/feed/ 0 Far-Red Lighting and the Phytochromes https://www.allthingslighting.org/far-red-lighting-and-the-phytochromes/ https://www.allthingslighting.org/far-red-lighting-and-the-phytochromes/#respond Thu, 14 Nov 2019 23:06:22 +0000 https://www.allthingslighting.org/?p=1241 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published 18/06/04. Most LED grow lights feature blue and red LEDs whose peak wavelengths – approximately 450 nm for blue and 660 nm for red ­– have been chosen to coincide with the spectral absorption peaks of chlorophyll A and B molecules. In doing so, […]

The post Far-Red Lighting and the Phytochromes appeared first on All Things Lighting® Association.

]]> https://www.allthingslighting.org/far-red-lighting-and-the-phytochromes/feed/ 0 Phytochrome and PSS https://www.allthingslighting.org/phytochrome-and-pss/ https://www.allthingslighting.org/phytochrome-and-pss/#respond Fri, 15 Feb 2019 22:26:20 +0000 https://www.allthingslighting.org/?p=272 Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd.   Published: 2016/12/09 Horticultural lighting is currently one of the fastest-expanding markets in commercial lighting, with projected revenues of several billion dollars in less than a decade. From the perspective of a professional lighting designer, the market opportunities are enticing. Whether it is lighting for […]

The post Phytochrome and PSS appeared first on All Things Lighting® Association.

]]> https://www.allthingslighting.org/phytochrome-and-pss/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 […]

The post Botanical Light Pollution appeared first on All Things Lighting® Association.

]]> https://www.allthingslighting.org/botanical-light-pollution/feed/ 0