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Light distance question

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    Light distance question

    Hi Growers,

    Viparspectra’s suggested light distance during flower is 18” for their XS2000 (dimmable 240 watt led qb).

    Actual distance with my two plants is 15-16”. In week 7 now with no symptoms of light burn.

    For what it’s worth, Vipar’s high PPFD specs in a 2x4’ tent are:
    1057 umol/m/s @18”
    1469 umol/m/s @14”
    1794 umol/m/s @12”

    Will my colas be okay at 15” at 100% power? If not, I can add 1-2” of clearance or reduce power level. Otherwise I’ll let it ride as is.
    Organic, coco & soil, 240w LED, 3 gallon fabric pots, basement grow in tent.

    You see what we don't Cheeba i did'nt have mine that close with 100% i use 75% at 20" eased my mind and they came out fine but your close up to your grow. Just when you see the slightest burn on those white hair you'll know it's not normal ripening??


    • Rik
      Rik commented
      Editing a comment
      SoOrbudgal how can you tell the difference between white pistils turning brown at the tips because of normal maturation as opposed to burn from too much light?

    • SoOrbudgal
      SoOrbudgal commented
      Editing a comment
      Well Rik if i see the first early budlets and the hairs going real brown too soon then ya know it ain't normal

    If you really want to know how close you can get with your light I'm afraid you'll have to singe some colas!
    2X4X6 Quictent
    1.5x3x5 Gorilla tent
    600w LED (80)
    1000w LED (180)
    2 X Viparspectra P-1000
    2 X 4" fan with carbon filter ducted to unused boiler chimney
    6" battery/usb fans
    Mother Earth 70/30 coco/perlite
    GH trio with Calimagic
    Lung room humidifier
    3 and 5 gal plastic buckets Nebulas coco for autos nute schedule.
    ArmorSi, kelp when needed
    Running at pH 6.0

    Grow 3
    Northern Lights auto
    auto 00 Kush

    Grow 4 8/23
    2x Northern lights auto
    1 auto 00 Kush
    1 Critical photo

    Don't just "grow weed",
    Cultivate a masterpiece.


    • SoOrbudgal
      SoOrbudgal commented
      Editing a comment
      True dat Catfish LOL not something to experiment with

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