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Should I keep my light hours or take it back down?

Scandic
Scandicstarted grow question 2d ago
I had 20/4 lightcycle on my autos but because of humidity problems, I had to raise the hours with light on. First to 22/2 and now I had to put it to 23/1. Tomorrow I will get another LED lamp and soon a dehumidifier. Can I then turn it down to 20/4 again without too much stress?
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Week 5
Setup. Lighting
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John_Kramer
John_Krameranswered grow question 1d ago
by all means or do minus 30min/1hour a day or say F it and do 24h xDDD
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ITCRW_GROW
ITCRW_GROWanswered grow question 1d ago
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00110001001001111O
00110001001001111Oanswered grow question 1d ago
DLI, DLI, DLI (daily light integral) It is not about hours of light. that is an incomplete perception. Rate x time = DLI. It's about photons per day, not hours per day. If you were providing a proper amount of DLI with 20h, you should go back to that... or 16h or 18h, whatever provides ~35-40 DLI. Local variables will impact exactly how much you can give and will be different than the next garden, but not too much given basic competency. use the umol/s PAR spec from your light. you need roughyl 80umol/s per sq ft for 12 hour operation. It is inversely proportional to hours of operation so you can adjust that '80' to fit any hours of operation. Doesn't matter if they are autoflowers or photoperiods in regard to max DLI. Still the same starting point and you adjust based on growth pattern, not whimsy. too tight? adjust power down. too lanky? adjust power up. 80umol/s PAR per square foot over 12 hours will get you to ~37 DLI. 2/3rds of that over 18h also gets you to 37 DLI. As far as growth and yield, DLI is what matters.. not watts or hours of operation. common sense required for light distribution and other concerns...
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