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. 2015 Jun 5;6:416. doi: 10.3389/fpls.2015.00416

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Copyright © 2015 Li, Heuvelink and Marcelis.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Daily PAR integral inside the greenhouse (sum of natural irradiance and supplementary lighting) during the experiment. Line represents moving average over 5 days.