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24 hour light vs. 18/6.

Discussion in 'Advanced Marijuana Cultivation' started by Sencha, Apr 27, 2010.

  1.  
    since1991

    since1991 Well-Known Member

    "Offsetting this via temp variance"...good stuff. And its key. Has to do with temp differential night/day variance and build up of phytochrome. Not necessarily short day nor c3 plants. Good post.
     
  2.  
    ANC

    ANC Well-Known Member

    Very few people have perfect climate control, so expecting them to offset anything is a shot in the dark.
    If you require the most of your plants, you will use professional grade thermal and humidity sensors and automation.
    The big guys don't accept anything over a fraction of a centigrade drift. Something like an ordinary airconditioner, has a very fuzzy thermostat/hygrostat, as it has to wait for the rest of the room/house to catch up with the temperature close to the appliance.

    I am busy designing a 1 plant, 1 light grow tube, it is easier (less costly) to set up perfect conditions in a small space with less light waste than doing a tent or a room.
     
    since1991 likes this.
  3.  
    since1991

    since1991 Well-Known Member

    Since I went sealed with a mini split..sante fe dehuey..Gavita doubles. I have way more control. I can set these appliances down to a 2 to 5 increment number in temp and rh. And its awesome how much control i actually have. Basically...I dont care the medium substrate (coco or wool) nor the fert/nute regimen. What determines my output with cultivars Iam playing with is plant numbers to canopy/net trellis management. Iam trying to hit 25 to 32 zips per Gavita 6/750. And doing it isnt easy despite claims. Consistently anyways. Per 4x4 I need only 6 to 9 with an easy peasy like Dream. She just gives it up with little effort. But something og kush like..I need easily double..and with multiple top training poking through the a double trellis.
     
    Last edited: Nov 12, 2017
  4.  
    ANC

    ANC Well-Known Member

    This, very much.

    Even more important when doing a COB grow.
    Our two grow beds equal only 24.6x4' but there are about 90 plants in there.

    I want to cry when I see people display their COB grow rooms with 4' tall plants standing around with light being wasted. ours are nearly done flowering and they are about knee height.
     
    Last edited: Nov 12, 2017
    since1991 likes this.
  5.  
    TheHero

    TheHero Member

    So, if I run a cool LED COB setup on low wattafge, does this affect my plants as well (24/0)? Should 24/0 be used for mother plant?

    Another question, is it any good - I grow seedling now under one COB and I change lights intensity up to 6 times a day, whenever I pass by that box, I just play a little with that dimmer. Maybe it stresses plants out? I had a stunt grow at start but I thought it was because of too wet soil/coco tablets and too much nutes added to soil.
     

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