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Heidi Marie Wollaeger and Erik S. Runkle

holes (diameter = 4 cm) were cut in the bottom. The light modules were placed on open, metal mesh benches inside the same refrigerated walk-in growth chamber. Fig. 1. Diagram of custom-built chambers that delivered light from light-emitting diodes (LEDs

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Brian R. Poel and Erik S. Runkle

light integral (DLI) as measured by aspirated thermocouples, infrared sensors, and quantum sensors, respectively, under ambient solar radiation with supplemental lighting treatments delivered by high-pressure sodium (HPS) or light-emitting diodes (LEDs

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Qinglu Ying, Chase Jones-Baumgardt, Youbin Zheng, and Gale Bozzo

Cryptochrome blue light photoreceptors are activated through interconversion of flavin redox states J. Biol. Chem. 282 9383 9391 doi: 10.1074/jbc.M609842200 Bourget, C.M. 2008 An introduction to light-emitting diodes HortScience 43 1944 1946 doi: 10

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Joshua K. Craver, Joshua R. Gerovac, Roberto G. Lopez, and Dean A. Kopsell

. Fig. 1. Spectral quality delivered from sole-source light-emitting diode arrays with light ratios (percent) of red:blue 87:13 (R 87 :B 13 ), red:far-red:blue 84:7:9 (R 84 :FR 7 :B 9 ), or red:green:blue 74:18:8 (R 74 :G 18 :B 8 ) at a total photon flux

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Mengzi Zhang and Erik S. Runkle

lighting treatments during an otherwise 15-h dark period (black bar). Plants were grown under a 9-h day without or with end-of-day lighting from red+white+far-red (R+FR; white bar) or far-red (FR; grid bar) light-emitting diodes at 2 to 3 μmol·m −2 ·s –1

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Masahumi Johkan, Kazuhiro Shoji, Fumiyuki Goto, Shin-nosuke Hashida, and Toshihiro Yoshihara

+ red (BR) light-emitting diode (LED) lights when raising seedlings and 12 h with sunlight supplemented with FL (1600 to 1900 hr ) when cultivated in the greenhouse. Fig. 2. Spectral photon flux distributions for the lighting treatments. ( A ) White

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Marc W. van Iersel and David Gianino

of the performance of the adaptive light-emitted diode (LED) light control system. The system controls the duty cycle of the LED light in such a way that the LED grow light provides just enough light so that the combined photosynthetic photon flux

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Thitipat Weeplian, Tsair-Bor Yen, and Yunn-Shy Ho

spectra, the light intensity of a selected treatment was maintained at a mean PPFD of 215 ± 15 μmol·m −2 ·s −1 , which nonsignificantly differed among the light spectrum treatments. Fig. 1. Spectral distribution of light-emitting diode (LED) light

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Andrea Stuemky and Mark E. Uchanski

. 2, lighted treatments were rerandomized within the same greenhouse bay and benches. Fig. 1. Light-emitting diode lighting treatments at night. (Left to Right) Control with flowering bulbs, whit/far-red, low blue with flowering bulbs, and high blue

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Daedre S. Craig and Erik S. Runkle

layers of aluminum mesh. Fig. 1. Light quality emitted from incandescent and light-emitting diodes (LEDs) between 600 and 800 nm. The number of red (R) and far-red (FR) diodes per lamp pair is indicated for each LED treatment. R to far-red FR ratios and