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How much light do you throw on your mainlined girls?

Discussion in 'Growing Marijuana Indoors' started by glueberry_crunch, Aug 12, 2017.

  1. How much light do you throw on your mainlined girls? Had 2 under a 400w HPS, and I feel it just wasn't enough. Curious what other mainliners are doing.
     
  2. why would mainlining a plant require different lighting requirements than non mainlined? I would think 400 watts of HPS should be sufficient.
     
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  3. Because the plants take up a lot of space when they are mainlined into 8 main colas.
     
  4. A picture would be good. Mainlined plants don't require more light than growing au natural, LST, or Scrog.
     
  5. That's only partly true, because it depends on how big (especially wide) they are. Had 2 under a 400w, and i feel that it wasn't enough light. Some areas of the plants were only able to get around 25k lux in flower, and the flowers got a little larfy. Sooo, that's why I'm asking other people who use the mainlining technique to share how much light they use.
     
  6. Actually trained and spread out plants require less light than untrained because it exposes more tops to more light - that's why a grower using t5's gets a better yield doing a scrog or lst because t5's have poor light penetration. Lights are more efficient on spread out plants than ones grown au natural because more of the plant is exposed to the light. I agree 400w is not enough light - I use a 650w with great results
     
  7. How many plants and how many square feet of canopy?
     
  8. Not necessarily. I've seen 2 8headed beasts sitting no higher than 12-14inches, from the first mainline, at the end of flower. Under 2 300w LEDs.

    What it comes down to is how much growth you allow to build up before you head into flower/how much defoliating you do while in flower. Which is how you would control how much light penetration you're getting to those nugs. (one of many ways)

    The spacial benefit from manifolding is that it allows you to unclutter the center. By spreading out the heads (often just around the rim of your pot) you get better light naturally yada yada. As it pertains to fitting multiple manifolded plants together in a room, this is heavily predicated on your pots (i dont see that info above) as you'll try to keep the plant growing within the horizontal confines of the pot.

    End of my rambling, 400w is plenty of light for a couple of plants. You should probably just look into how you're confining them and defoliating.
     
  9. I only grow 2 plants because they produce enough smoke to last me a year - average 8-9oz. per plant. I don't know the square feet of the canopy but the two plants don't fill up my entire scrog net in a 4x4 tent - I could easily grow 1 or 2 more.

    Flower 6 weeks.JPG
     
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  10. #10 glueberry_crunch, Aug 14, 2017
    Last edited: Aug 14, 2017
    No. I'm not talking about height.

    An 8 cola plant will generally have different light requirements than a 32 cola plant. I really don't want to debate this. I'm just asking how much light you are giving your plants if you use mainlining.

    And 7 gallon pots, vegged for 9 weeks. Good sized girls. Used a light meter. Concluding: not enough light.

    How much light do you use on your mainlined plants?
     
  11. Thank you. This helps.

    You think you could add more girls with the same amount of light? How far do you generally keep the light from the canopy?
     
  12. I could add at least one more plant, possibly two with my 650w led. I keep the light 16" from the tops.
     
  13. Cool. Thanks. I think the 400w HPS covers 3x3 fine. But the 2 mainliners are going longer than that, basically going end to end of the 4x4 tent along one dimension.
     
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  14. One plant 16 tops 3 gal 175w Unit Farm UFO80 led light 2x2
    17 days from flip
    20170813_120831.jpg
     
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  15. Thanks!
     

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