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HeyPK said:
Lets say we have some plants on a 12 hour photoperiod. They start closing up after 11 hours. If you reduce the photoperiod to 11 hours, you will find that they will start closing up after 10 hours. If you increase the photoperiod to 16 hours, you will find that they will start closing at 15 hours.
Is this just a theory or are you saying you have done this and seen that this was the effect?
 
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