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Geoffrey Weaver and Marc W. van Iersel

., 2019 ). Dimmable LED lights can be interfaced with quantum sensors and control systems, allowing for adaptive lighting control ( van Iersel and Gianino, 2017 ). With adaptive lighting, supplemental light is provided so that the PPFD of sunlight and

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Geoffrey Weaver and Marc W. van Iersel

early season production can be reduced by 24% for Petunia × hybrida ‘Daddy Blue’ and 37% for Impatiens walleriana ‘Super Elfin XP Violet’ using an adaptive lighting control approach that accounts for crop light use efficiency. Thus, understanding

Open access

Claudia Elkins and Marc W. van Iersel

precisely controlled and programmed to respond to environmental parameters (e.g., sunlight) in real time ( van Iersel and Gianino, 2017 ; van Iersel et al., 2016 ; Weaver et al., 2019 ). Our adaptive lighting control system measures the PPFD of the

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Zhengnan Yan, Long Wang, Jiaxi Dai, Yufeng Liu, Duo Lin, and Yanjie Yang

, G. van Iersel, M.W. 2020 Longer photoperiods with adaptive lighting control can improve growth of greenhouse-grown ‘Little Gem’ lettuce ( Lactuca sativa ) HortScience 55 4 573 580 https://doi.org/10.21273/HORTSCI14721-19 Wei, H. Zhao, J

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Marc W. van Iersel and David Gianino

. 5 ), without an interactive effect between the duty cycle and sunlight. This illustrates that the adaptive lighting control method does not provide additional PPF more efficiently; instead, it provides additional light specifically when ambient