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OfflineChillWillis
old school fool


Registered: 06/14/09
Posts: 2,213
Last seen: 7 years, 3 months
Lighting - The more the merrier?
    #323832 - 11/30/09 05:30 PM (14 years, 3 months ago)

I currently have a 3ft3 floweing room being supplied with 16,000 lumens via 150w HPS. If I throw a 17w t8 7800k and a 15w t8 4200k into the room with the HPS on the same hours will it increase yield, shorten flowering time or do anything beneficial?


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It's not a war on drugs, it's a war on personal freedom.

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Offline81renaissance
Coachella '13 KKOTY
Male


Registered: 04/20/08
Posts: 4,182
Loc: State of Mind Flag
Last seen: 1 month, 13 days
Trusted Cultivator
Re: Lighting - The more the merrier? [Re: ChillWillis]
    #323837 - 11/30/09 05:32 PM (14 years, 3 months ago)

More light=better yield up to the point of diminishing returns (which you won't even get close to with the lights you mentioned).


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"So it goes."
-Kurt Vonnegut


BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.

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InvisibleHarry_Ba11sachM
cannoisseur
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Registered: 04/20/08
Posts: 11,753
Loc: Nepal Flag
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Re: Lighting - The more the merrier? [Re: ChillWillis]
    #323839 - 11/30/09 05:32 PM (14 years, 3 months ago)

what's up with all these people giving us dimensions in cubic feet? give us the floor dimensions in square feet if necessary, but a standard LxWxH measurement is best.

that being said, it will likely increase yield. flowering time is determined by the genetics mostly.


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OfflineSmOakland
Now with Grow!
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Registered: 05/31/09
Posts: 2,662
Loc: Oaktown to NOLA
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Re: Lighting - The more the merrier? [Re: Harry_Ba11sach]
    #324011 - 11/30/09 07:53 PM (14 years, 3 months ago)

Those floros are hardly significant but they mos def will not hurt.

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InvisibleTriptonic
Male


Registered: 06/13/08
Posts: 15,581
Loc: Flag
Re: Lighting - The more the merrier? [Re: ChillWillis]
    #324021 - 11/30/09 07:58 PM (14 years, 3 months ago)

Yes the more the merrier more light= denser bud, healthier plants. But you have to account for the heats of the lights.

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OfflineLucid
Monster Plant Creator
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Registered: 07/18/08
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Re: Lighting - The more the merrier? [Re: Triptonic]
    #324036 - 11/30/09 08:09 PM (14 years, 3 months ago)

I concur with trip, just make sure you account for any temp changes.

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OfflineChillWillis
old school fool


Registered: 06/14/09
Posts: 2,213
Last seen: 7 years, 3 months
Re: Lighting - The more the merrier? [Re: 81renaissance]
    #324039 - 11/30/09 08:10 PM (14 years, 3 months ago)

I have 2 more of the 17w and 1 more of the 15w. Throw them in too?
Genetics are random bag seed.


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Edited by ChillWillis (11/30/09 08:12 PM)

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OfflineLucid
Monster Plant Creator
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Registered: 07/18/08
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Re: Lighting - The more the merrier? [Re: Triptonic]
    #324043 - 11/30/09 08:13 PM (14 years, 3 months ago)

double post.

Edited by Lucid (11/30/09 08:13 PM)

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InvisibleDataM
That Guy
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Registered: 08/12/08
Posts: 3,975
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Re: Lighting - The more the merrier? [Re: Lucid]
    #324899 - 12/01/09 09:02 PM (14 years, 3 months ago)

Light Intensity increase will cause an increase in yield up to a point...one needs to make sure that the temperature is kept in check and in order to bump up the reaction rate you need to begin increasing the CO2 concentration.

Also, stagnant air is unacceptable in high light intensity. RuBisCO, or Ribulose-1,5-bisphosphate carboxylase oxygenase, the enzyme responsible for CO2 fixation, will begin to fix Oxygen in times of low CO2 concentration or high O2 concentration. This produces a 2 carbon product that cannot be utilized by the calvin cycle, drains existing sugars from the plant during the recovery of the RuBisCO enzyme and salvaging of the wasted carbon, produces ammonia during the salvaging process which then evaporates and leaches nitrogen from the plant, and produces a toxic intermediate chemical during the salvaging process that can be deadly in high concentration, and inhibit photosynthetic reactions in low and high concentrations.

Also...beyond the high end of the recommended lighting requirements is a waste of money and electricity since most of the excess light is absorbed by accessory pigments and converted to heat...

hope this helps, please correct any misinformation i might have provided,

peace,
agmotes165


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“The Universe is under no obligation to make sense to you” -NDT

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OfflineChillWillis
old school fool


Registered: 06/14/09
Posts: 2,213
Last seen: 7 years, 3 months
Re: Lighting - The more the merrier? [Re: Data]
    #325093 - 12/02/09 11:01 AM (14 years, 3 months ago)

As a closet grow the only ventilation the area gets is when I leave the door open with a fan blowing into the other fans in the grow area.

Is this what's causing the stem parts of the leaf and surrounding stems to be purple?


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InvisibleDataM
That Guy
Male


Registered: 08/12/08
Posts: 3,975
Loc: Southwestern US Flag
Re: Lighting - The more the merrier? [Re: ChillWillis]
    #325113 - 12/02/09 11:37 AM (14 years, 3 months ago)

I have the same setup as you and I have the same thing happening where my stems are a purple-red...not really sure what it means...

peace,
agmotes165


--------------------
“The Universe is under no obligation to make sense to you” -NDT

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OfflineChillWillis
old school fool


Registered: 06/14/09
Posts: 2,213
Last seen: 7 years, 3 months
Re: Lighting - The more the merrier? [Re: Data]
    #325161 - 12/02/09 12:55 PM (14 years, 3 months ago)

Quote:

m3kgt said:
Most of the time redish purple stems are not a cause for too much concern but the plants need to be watched for any other signs that could match up to a deficiency.  Purple discoloring of the main stems, leaf stems, and the veins of the undersides of the leafs could be caused by a few things and could also just be normal genetics. Most of the time I have found it to be cause by dark period temps to be dropping down too low (more than 15 degrees F).  A phosphorus (P) deficiency can also be the cause if the leaves are starting to turn dark with a bluish green tint.  If interveinal yellowing is starting to occur along with the purpling stems then it could be either a Nitrogen (N) or Sulfer (S) deficiency. If the above is not occuring everything is fine. 



http://www.growery.org/forums/showflat.php/Number/78093#78093


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It's not a war on drugs, it's a war on personal freedom.

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