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Wesley C. Randall and Roberto G. Lopez

supplemental DLI of 5.8 mol·m −2 ·d −1 . Supplemental light was delivered from a 150-W HPS lamp (PL2000; P.L. Lights, Beamsville, Ontario, Canada) or one of three LED arrays (Philips GreenPower LED research module; Koninklijke Philips Electronics N.V., The

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W. Garrett Owen and Roberto G. Lopez

(Philips GreenPower Flowering deep red/white/far red LED lamp; Koninklijke Philips Electronics N.V., The Netherlands). Supplemental light was delivered from a 150 W HPS lamp (PL 2000; P.L. Light Systems Inc., Beamsville, ON, Canada) or one of five LED

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Jing Huang, Ya-liang Xu, Fa-min Duan, Xu Du, Qi-chang Yang, and Yin-jian Zheng

were subjected to four supplemental light treatments, to study the effects on of alternating red and blue light the growth, nutritional quality, and antioxidant capacity of the plants and optimize the mode of supplemental red and blue light exposure

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Cynthia B. McKenney, Sandra A. Balch, and Dick L. Auld

the initiation of germination ( Vyas and Agarwal, 1970 ). Germination may be enhanced with supplemental light treatments used after imbibition ( Vyas and Garg, 1973 ). Origin Seed from four accessions exhibiting a uniformly dense, compact, and

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Jasmine Jenji Mah, David Llewellyn, and Youbin Zheng

supplemental light treatments must overcome the background intensity and quality characteristics of natural light to elicit photomorphogenic effects. One notable feature of the solar spectrum on Earth is that the R:FR tends to decrease at the ends of the

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Sorkel Kadir, Michael Von Weihe, and Kassim Al-Khatib

pots (16.25 × 16.25 × 12.5 cm) under greenhouse conditions. Vines were placed in a greenhouse at 22 day/17 night ± 3 °C (D/N) temperatures, 50% ± 10% relative humidity (RH), and 16/8-h photoperiods. Supplemental light intensity on a horizontal plane

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Wesley C. Randall and Roberto G. Lopez

., Logan, UT)] from 0600 to 2200 hr ( Table 1 ) for 21 d (geranium and marigold) or 28 d (impatiens, petunia, and vinca). Supplemental light was delivered from either two 150-W HPS lamps (PL 2000; P.L. Light Systems Inc., Beamsville, Ontario, Canada), or

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Martin P.N. Gent

al., 1998 ). Supplemental light at night lowered nitrate by 60% and 9% in the leaf blades and petiole, respectively, compared with a control with no supplemental light ( Steingrover et al., 1986b ). When nitrate was withdrawn for 2 d after reaching

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Ryan M. Warner

Armitage, A.M. Tsujita, M.J. 1979 The effect of supplemental light source, illumination and quantum flux density on the flowering of seed-propagated geraniums J. Hort. Sci. 54 195 198 Bates, D.M. 1965 Notes

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Gary W. Stutte

spectra, and reducing overall energy requirements is resulting in tax incentives for adoption and regulatory penalties for noncompliance to phaseout traditional supplemental light sources ( Yamada and Chwastyk, 2013 ). The inclusion of LED technology in