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. 2014 Nov 3;19(11):17810–17828. doi: 10.3390/molecules191117810

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© 2014 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Linear (light-dependent) portion of light response curves measured under red/blue LED (closed symbols, solid line) versus ambient sunlight (open symbols, dashed line) at WE (left column) and RR (right column). (A) Red leaves at WE, n_LED = 10 n_Sun = 10; (B) Green leaves at WE, n_LED = 12 n_Sun = 9; (C) Red leaves at RR, n_LED = 9 n_Sun = 10; (D) Green leaves at RR, n_LED = 9 n_Sun = 13. All measurements made during winters of 2011–2013.