Lights 24/7 or 18/6 Confused.
- Thread starter Theo
- Start date
babygro
Well-Known Member
18/6. Plants cannot process more than 18 hours of light a day, so it's simply wasted light, electricity and money. If you can save money on those 6 hours of light, with no difference in vegetative growth, why the hell would you want to use 24 hour lighting?
AllMeatNoPotato
Well-Known Member
although what you said is correct babygro, some people use 24 hrs of light because it is cold where they are growing and it is a good way to keep the enviornment warm.
babygro
Well-Known Member
Are they going to keep them on 24 hours when they go 12/12 as well then?
eLLisD
Well-Known Member
If I have to get the book to back me up I will, but Ed Rosenthal states in the "Indoor High Yeild Guide" that plants grown under continuous lighting in vegatative growth (24/7) DO get off to a better start than when plants are grown under a different light schedule. No its not going to have a monsterous effect, but It will be better than not doing it.
eLLisD
Well-Known Member
Why would they do that if they wanted bud to smoke?
babygro
Well-Known Member
His plants are 4 weeks old in vegetative growth, does what Ed Rosenthal said still apply then? I would tend to agree that in seedling stage for the first week or so 24 hour lights can help, but after that you should switch to 18 hours. I give my seedlings 24 hours for the first week or so.
This guys plants are 4 weeks old in vegetative state! It would be nonsense to have the lights on 24 hours!
AllMeatNoPotato
Well-Known Member
lol thats funny ellis. jorge said that in one of his dvd's that plants can only systhesise 18 max hours of light and they need dark time. something like during light hours they store alot of sugars and at night use those sugars to promote root development.
babygro
Well-Known Member
My point (clearly, well lost on you it seems) was that if they have to have the lights on 24 hours as a means to heat up their environment as Meatandpotato suggested, what are they going to do to heat it up when they go 12/12? They have to solve that problem of heating sooner or later and it shouldn't be a reason to keep the lights on 24 hours a day because it's wasted energy. They need to find a means of controlling their environment temperature without relying on the lgihts - that was the point.
Make sense now?
babygro
Well-Known Member
Clearly lost on you too it seems. Tsk.
HighPressureGrowth
Active Member
Personally I agree with both answers.
24 hrs light for 1 week for seedlings.
18/6 hrs light for veg.
12/12 hrs light for bloom.
If cold temperatures are that out of hand maybe just get a small cheap space heater. I've seen several for under $40. Playing it cheap seems to slow things down and decrease yield due to but not limited to:
=insufficient lighting
=major temperature fluctuations.
=carelessness
The 2 major steps of photosynthesis are as follows:
1.The first process is the Light Dependent Process (Light Reactions), requires the direct energy of light to make energy carrier molecules that are used in the second process.
2.The second process is the Light Independent Process (or Dark Reactions) occurs when the products of the Light Reaction are used to form C-C covalent bonds of carbohydrates. The Dark Reactions usually occur in the dark, if the energy carriers from the light process are present.
Recent evidence suggests that a major enzyme of the Dark Reaction is indirectly stimulated by light, thus the term Dark Reaction is somewhat of a misnomer.
24 hrs light for 1 week for seedlings.
18/6 hrs light for veg.
12/12 hrs light for bloom.
If cold temperatures are that out of hand maybe just get a small cheap space heater. I've seen several for under $40. Playing it cheap seems to slow things down and decrease yield due to but not limited to:
=insufficient lighting
=major temperature fluctuations.
=carelessness
The 2 major steps of photosynthesis are as follows:1.The first process is the Light Dependent Process (Light Reactions), requires the direct energy of light to make energy carrier molecules that are used in the second process.
2.The second process is the Light Independent Process (or Dark Reactions) occurs when the products of the Light Reaction are used to form C-C covalent bonds of carbohydrates. The Dark Reactions usually occur in the dark, if the energy carriers from the light process are present.
Recent evidence suggests that a major enzyme of the Dark Reaction is indirectly stimulated by light, thus the term Dark Reaction is somewhat of a misnomer.
sky high stoner
Active Member
people get a heat lamp or small space heater when you are not using the lights. it does work but make sure that there is good circulation, after all in the wild tempuature does drop slightly at night the space heater has worked for me