Changing when 12/12 cycle starts (7pm rather than 9pm) part way through cycle

Ridgegoo

Active Member
I realize now that I should have my lights running from 7pm to 7am rather than 9pm to 9am. I've been flowering for about 2 weeks now. Would changing it now stress the plants too much? Should I do it slowly? (15 minutes every few days?)
 
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