Side-effects of increasing yields with increased light intensity

Discussion in 'Advanced Marijuana Cultivation' started by James Eaves, Nov 16, 2017.

    James Eaves

    James Eaves Member

    Would anyone mind sharing experiences they have had with trying to either reduce the length of their harvest cycle or increase yields by increasing light intensity? The reason I ask is that we are designing an experiment where we increase yields or decrease harvest time with increased light intensity, while monitoring the plants with different types of sensors to see if we can catch negative side-effects (nutrient burn, beaching...) early and treat them cost-effectively, or identify the thresholds where those side-effects begin. So I am trying to anticipate as many side-effects as possible in advance by asking growers to share their experiences (What intensity did you try? How did you manage or avoid side-effects?). Thank you.
    Chunky Stool

    Chunky Stool Well-Known Member

    A buddy of mine has managed to bleach the tips of his buds a few times using Platinum LEDs (blurple).
    I'm pretty sure it's a combination of intense light and low PPMs. He overfed his plants when he first started growing and has been gun shy ever since. He also believes his plants will finish sooner than they actually do, so they get zero nutes the last 3 weeks.
    It's kinda sad.
    Hell he gave me a sack from a year ago that I *might* use for butter.
    Or I might just throw it away. Buds are bleached and underfed with white tips. I'll get a pic...
    -- edit --
    OK, the tips aren't as bleached as I thought. Or I may have pinched them off. I don't remember.
    Either way, it's pretty awful. Smells stale and grassy.
    Last edited: Nov 16, 2017

    vostok Well-Known Member

    Side-effects of increasing yields with increased light intensity..?
    Hey all,
    Was at my mates place today sitting down having a few

    when a Smoke Detector started going off it's nut.

    We both jumped up and made a dash for the room and upon entering it was smokey,

    we opened the zippa door to his room and sure enough the flames where about half a foot high.

    I did the mad dart to his kitchen where he has a 1kg Dry Powder fire extinguisher went in the room

    and gave it a 2 second burst and it was out. Bloody messy tho the room was filled with powder from that 2 seconds.

    Anyway it was his Co2 system he imported from the US that was from a company called Bey Tech

    it was ment to be a fire proofed fail safe system.

    The box went up and if we had not been there he would now be explaining to the police why he is homeless.

    If you get the chance to look at this Co2 Blackbox have a look and BEWARE....

    My suggestions to every1 is to get a few smoke deectors and an extinguishers for the sake of $30 if could save you a lot of explaining.

    P.S I was told that the dry powder is only baking soda? Can any1 confirm? Also willl it kill his ladies they seemed ok after a shower? But I guess time will tell.

    HydoDan and ruwtz like this.

    nachooo Well-Known Member

    Increase ventilation, mantain moderately high temps, do not use a single point of light, Ideal situation would be a complete photon inmersiĆ³n using led strips evenly distributed across the canopy.
    Instead of increase the ppfd with more lights at he canopy, add photons in side lighting. Use CO2 if you can. Use an hour of darkness in the middle of the day light hours to relief plants stress.... Let your plants drink as they want, so maybe you have to change nute concetration.
    You can go to at least 1500 ppfd this way without bleaching or heat problems if you use these tech. Also if you use sativa strains they can tolerate better higher lights intensities and hotter temps.
    Good luck

    SonsOfAvery Well-Known Member

    full of purple

    full of purple Well-Known Member

    Looks like he underfed the shit out of them and chopped way to early
    Chunky Stool likes this.

    firsttimeARE Well-Known Member

    Plants look terrible.

    Was thinking of getting one of those auto fire extinguishers or making my own sprinkler system for some peace of mind.

    My issue with the auto extinguishers is they need to be replaced every so often and the fear of it,going off unnecessarily.
    full of purple

    full of purple Well-Known Member

    Yea that could happen I would just wire everything up correct no wires to get wet on floor and everything should be good
    Chunky Stool likes this.

    firsttimeARE Well-Known Member

    Yeah. But nothing gives peace of mind like knowing you got 100gal tank,full of water ready to extinguish a fire if it ever happened.

    Been growing for 6 years issue free. Its a small,concern. But now that im a homeowner its a little more scary.
    full of purple

    full of purple Well-Known Member

    Oh yea so true
    Well now days for peace of mind you can allways wire up a camera watching the grow
    And have it on wifi to your phone
    full of purple

    full of purple Well-Known Member

    That's my next step
    So I can leave for days at a time worry free

    firsttimeARE Well-Known Member

    I thoight about that. But the camera,doesnt,do anything. In the unfortunate event it does catch fire I guess ill have good,video,coverage? Lol

    ScoobyDoo90 Well-Known Member

    thought i was the only paranoid one about fires,
    nachooo likes this.

    rkymtnman Well-Known Member

    i use 2 per square meter.
    j.t.1986 likes this.

    ScoobyDoo90 Well-Known Member


    rkymtnman Well-Known Member

    i think the smoke and the 20 foot tall flames will give away your stealthiness.
    Chunky Stool

    Chunky Stool Well-Known Member

    Electrical connections go above your waist, everything wet stays below.

    There's a dirty joke in there somewhere... :eyesmoke:
    HydroRed, CanadianDank and macsnax like this.

    StinkBud Well-Known Member

    You can run quite a few lights with no ill effects if you can keep your environment under control. Heat is usually your biggest enemy. Too much heat and your shit will run like a track star.

    Here in Oregon the best flower is being grown in light-dep/light-assist greenhouses.

    ANC Well-Known Member

    Optimal temp (if you can manage optimum humidity without any localized high(wet) spots) is approaching 30C 80F, I would back off to 75 at 45%RH in late flower. (I'd rather run a tad dry than set up a good environment for pathogens).
    macsnax likes this.

    macsnax Well-Known Member

    I run a lower rh for the last half of flower, 40% because of a mold experience. I've had a few people tell me it's too low. People that haven't had it don't understand.

Share This Page