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Ying Ma, Xinduo Li, Zhanying Gu, and Jian’an Li

increase ornamental value of succulent plants. Metal halide and high-pressure sodium lamps changed the leaf color of Crassula ovata (‘Hummel’s Sunset’ and ‘Gollum’ varieties) ( Park et al., 2015 ). The most desirable leaf color, red, was obtained under

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W. Garrett Owen, Qingwu Meng, and Roberto G. Lopez

) photoperiod consisting of natural daylengths with supplemental lighting from high-pressure sodium lamps (e-system HID; PARSource, Petaluma, CA) that delivered a PPFD of ≈70 μmol·m −2 ·s −1 at plant height. Two commercially available low-intensity LED lamps

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Charlie Garcia and Roberto G. Lopez

-emitting diodes and high-pressure sodium lamps have comparable growth, morphology, gas exchange, and post-transplant performance HortScience 48 428 434 Demers, D.A. 1998 Physiologie, photosynthèse et métabolisme carboné de plants de tomate ( Lycopersicon

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W. Garrett Owen and Roberto G. Lopez

·m −2 ·s −1 delivered from high-pressure sodium lamps or ( C ) LED arrays delivering 100 µmol·m −2 ·s −1 of 100:0 red:blue, ( D ) 100 µmol·m −2 ·s −1 of 87:13 red:blue, ( E ) 100 µmol·m −2 ·s −1 of 50:50 red:blue, ( F ) 25 µmol·m −2 ·s −1 of 0

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Krishna Nemali

could hasten maturity in plants ( Bailey, 1891 ). Fig. 7. Electric lighting models developed during the 19th and 20th centuries. ( A ) Carbon arc lamp. ( B ) Mazda incandescent lamp. ( C ) High-pressure sodium lamp. ( D ) Different colors of light

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W. Garrett Owen and Roberto G. Lopez

under light-emitting diodes and high-pressure sodium lamps have comparable growth, morphology, gas exchange, and post-transplant performance HortScience 48 428 434 Currey, C.J. Hutchinson, V.A. Lopez, R.G. 2012 Growth, morphology, and quality of rooted

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Po-Lung Chia and Chieri Kubota

. Similarly, use of an oscillating aluminum parabolic reflector used for high-pressure sodium lamps [such as one examined by Blanchard and Runkle (2010) to control flowering] may be combined with such high-output FR LEDs to achieve a necessary saturation

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Oliver Körner, Jesper Mazanti Aaslyng, Andrea Utoft Andreassen, and Niels Holst

were continuously measured, averaged over 5 min, and stored in a data logger (CR10X; Campbell Scientific, Logan, Utah). Supplementary lighting was used (see Table 1 ). Ten high-pressure sodium lamps (SON-T, 400 W; Philips, Eindhoven, The Netherlands

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Celina Gómez and Cary A. Mitchell

increasing total DLI. High-pressure sodium lamps are the most widely used electric light source for greenhouse SL during transplant production. In general, HPS lamps provide an orange-biased spectrum by primarily emitting light in the range of 565 to 700 nm

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A. Maaike Wubs, Ep Heuvelink, Leo F.M. Marcelis, Gerhard H. Buck-Sorlin, and Jan Vos

and the same architecture could be established in all plants. Supplemental light was provided by high-pressure sodium lamps (600 W; Philips, Eindhoven, The Netherlands), which provided 150 μmol·m −2 ·s −1 at crop level. Lamps were switched on between