No announcement yet.

400W @ 80F or 250W @ 72F????

  • Filter
  • Time
  • Show
Clear All
new posts

    400W @ 80F or 250W @ 72F????

    On my fourth grow, finally got everything set perfect. Aircooled hood, S6 inline fan by afinity, and have by nutrients down and some good seeds. BUT it is still my hardest problem to date, temp is a bit more than id like for my 400w MH/HPS. Should I just set my grow to 250W and let it run or would by yeild change too much. Also, temps have been the obstacle imo from getting really dense nuggaroos. Help!

    About two weeks in, flowers have they round leaves still and on their first pair of serrated leaves...

    I start to turn my dial down about week 6. In nature that’s about when it starts cooling off, plants inside seem to respond well to lower temps later on in flower. Seems to help with trichome production as well. As long as they’re not showing signs of heat stress run it at 100% through week 5. Then once they start drinking as much and not growing taller starting turning the dial down
    Last edited by bboyfromwayback; 09-15-2021, 09:40 PM.


      Nothing wrong with 80°F. Are they running any hotter? Are you able to run an AC in the lung room, or even a portable ac?
      5x5 Gorilla tent
      Spectrum King SK402 - 2× Optic XL1
      Infinity T8 exhaust fan
      Technaflora nutes
      Nectar of the Gods soil


      • SmartWater
        SmartWater commented
        Editing a comment
        82, but i ran it at the hottest part of the day with my windows ac at its coldest setting

      80 should be ok until mid flower.

      Remember, light is food, it allows the plant to photosynthesize CO2 and nutrients from the root system into sugar energy and oxygen.
      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.


        Thanks for the input!! Ill run it 100% til midflower 👍


        • Catfish22
          Catfish22 commented
          Editing a comment
          Just be sure to listen to your plants and adjust accordingly!
          Welcome and happy farming! 🙂🌱

        you could also run your hps at night. I do this and never go over 80, as long as you are not going over 85 you should be fine.


        Check out our new growing community forum! (still in beta)

        Subscribe to Weekly Newsletter!