Is it safe to change light schedule?

asdewqasdfgh

asdewqasdfgh

Active Member
I just switched my lights to 12/12 and i want the lights to be on from 9-9 and right now they are on from 12-12. can i switch it without it stressing the plants too much?
 
Kalebaiden

Kalebaiden

Well-Known Member
I imagine it could be done and while I understand the 12/12 schedual and btw the benefits for your plants are max'd at 12/12 a 9/9 schedual doesn't quite add up. Plants need 12 hours of darkness.


'Research has proven that less than 12 hours of light will not induce flowering any fasterand reduces flower formation and yield" - Marijuana Horticulture; The indoor/outdoor medical grower's bible, Jorge Cervantes, 2006
 
asdewqasdfgh

asdewqasdfgh

Active Member
basically they would only be missing 3 hours of sleeping tonight and then they will back on track tomorrow. im gonna try it, it shouldnt hurt em.
 
mufastaa

mufastaa

Active Member
I want to switch from 6am-12pm cycle to a 9-9 cycle too, and also have that 24h of darkness to start flowering sooner. A couple options im thinking of, dont know which is best.
Should I leave the lights on all night tonight until 9am then do 24 hours and start 12/12 from there (27 hrs light)? OR
Should I let the lights go out at midnight, and not turn them on again until 9am the next day (33 hrs darkness)?

Im leaning towards the first option because they are still in veg so a few extra hours shouldnt hurt right? help appreciated.
 
Dima79

Dima79

Member
mufastaa said:
I want to switch from 6am-12pm cycle to a 9-9 cycle too, and also have that 24h of darkness to start flowering sooner. A couple options im thinking of, dont know which is best.
Should I leave the lights on all night tonight until 9am then do 24 hours and start 12/12 from there (27 hrs light)? OR
Should I let the lights go out at midnight, and not turn them on again until 9am the next day (33 hrs darkness)?

Im leaning towards the first option because they are still in veg so a few extra hours shouldnt hurt right? help appreciated.
Click to expand...
Heres a bump to old thread, I'm about to flip lights as well..

wonder what will be better for the plant, a few extra dark hours or few extra light hours ?

My schedule for now is 18/6 from 8am to 2am light, want to move 12/12 - 10am to 10pm

Plants been in veg for almost 2 months.
 
bigv1976

bigv1976

Well-Known Member
smokinrav said:
Just extend the dark period and you'll have no problems.
Click to expand...
Great answer. Extra dark will be safer during flower than extra light but either way you should be all set. I actually give my flowering plants a single 24 hour light period around week 5 of flowering when the growth slows down to give them a boost back into growth and it works great.
 
BullwinkleOG

BullwinkleOG

Well-Known Member
i did this with mine i had them on 18/6 going off at 10 and coming back on at 6 when i switched to 12/12 i have them go on at 12 midnight and go off at 12 noon
 
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