PPFD Archives - All Things Lighting® Association https://www.allthingslighting.org/tag/ppfd/ Illuminating the Complicated! Mon, 16 Oct 2023 06:53:06 +0000 en-US hourly 1 https://www.allthingslighting.org/wp-content/uploads/2023/08/cropped-ATLA-favicon2-32x32.jpg PPFD Archives - All Things Lighting® Association https://www.allthingslighting.org/tag/ppfd/ 32 32 Defining Photosynthetic Photon Efficacy https://www.allthingslighting.org/defining-photosynthetic-photon-efficacy/ https://www.allthingslighting.org/defining-photosynthetic-photon-efficacy/#respond Fri, 26 Jun 2020 19:39:58 +0000 https://www.allthingslighting.org/?p=1859 There has been some discussion online and in presentations recently about the issue of photosynthetic photon flux. The argument goes as follows: Photosynthetically Active Radiation (PAR) is somewhat arbitrarily defined as optical radiation within the spectral range of 400 nm to 700 nm. Exposing plants to far-red radiation (defined as 700 nm to 800 nm) […]

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