Results 1 to 11 of 11

Thread: watts v temperature

  1. #1

    Join Date
    Feb 2017
    Location
    up north
    Posts
    29
    Thanks
    1
    Thanked 47 Times in 19 Posts

    Question watts v temperature

    after a search i found the Thread: Airflow / Temperature / Wattage table (and calculation).
    but, being a newbie, i didnt get much of what was being said

    not what i was looking for anyway, so a little advice please

    i'm growing 3 plants in 6ft high x 4ft square tent, 2 white widow, 1 CBD something
    the CBD has two heads now 4 1/2ft high so light is racked at top poss height, rest are 3 1/2ft- ish high
    its on 12/12 starting at 8 am
    buds came out 8 days ago, lots of nice, white heads and all looks healthy


    but, i really dont know what is more important

    if i put light at 60W, with extractor going, and tent shut, the temperature quickly hits 30 degree, if i leave it too long, while I'm at work, that can go to 34 by time i get back
    so, i open up whole front of tent to cool it off till 8pm
    i know that is bad, but they all continue to look healthy - how much does a period of excess temp hurt the THC / CBD??

    if i put light at 40W, temperature stays around 25degree with tent shut all day,


    is it more important to have the 60W light at this stage of growth
    and thus have to leave tent open all day

    or is 40W fine
    and i can leave tent zipped up all day??
    Last edited by celery; 15-03-17 at 11:35 PM.

  2. #2

    Join Date
    Aug 2016
    Location
    Stuck in a chair most of the time.
    Posts
    3,894
    Thanks
    5,158
    Thanked 10,015 Times in 3,459 Posts

    Default

    Lets start with what light or lights are you using?

    Then move on to what heat and odour extraction method are you using? Make of inline fan, size of fan and carbon filter.


    As you have more than ten posts could you upload an image of your plants. It may be that you need to bend or train the tall plant so as to allow more equal light to the canopy.
    “The real voyage of discovery consists not in seeking new landscapes but in having new eyes.”
    – Marcel Proust

    New Diary Viz doing Coco under CDM. LINK


  3. The Following 2 Users Say Thank You to Viz For This Useful Post:

    British green (16-03-17), Dazmandaz (16-03-17)

  4. #3

    Join Date
    Feb 2017
    Location
    up north
    Posts
    29
    Thanks
    1
    Thanked 47 Times in 19 Posts

    Default

    hi viz
    ty for the reply
    and
    sorry about the long delay
    been away with no net

    right

    lights
    The Sunmaster Hobby 600w Ballast
    , powering lamps at their optimum for maximum grow light output (PAR), extending lamp life,features: - 250w,400w,600w & 660w +Power Mode -

    Red Scorpion Inline Duct Fan
    Red Scorpion Carbon Filter
    Red Scorpion Extraction Kit 315mm (12″) X 600mm – 1940m3/hr

    basically
    is it better to have 60W when budding, and leave tent open
    or 40W, and leave tent closed
    to get the right temp
    25-27 i believe???

    thanks

    i shall posts some pics later for advice on bending and training, please
    bear with me
    am newbie in more than post count

  5. #4

    Join Date
    Jun 2014
    Posts
    159
    Thanks
    145
    Thanked 156 Times in 93 Posts

    Default

    Celery -

    Its important to be accurate when asking for help.
    Huge amount of help here especially from the veterans but posting crap in will get crap out.

    Your not running 40w or 60w. Assume you mean 400w or 600w? Are you changing the bulbs when switching the ballast?

    "Red Scorpion Extraction Kit 315mm (12″) X 600mm – 1940m3/hr" - this will suck up a 4ft square tent and spit it out.
    What's the proper measurements of the tent? Or perhaps your using a fan controller.
    Even so the filter wouldn't fit in a 4ft area.

  6. #5

    Join Date
    Aug 2014
    Location
    In A Land Of Make Believe
    Posts
    5,348
    Thanks
    13,324
    Thanked 13,342 Times in 4,903 Posts

    Default

    aloha celery. Temp control is affected by several factors working together.

    is point of air extraction up near your bulb? to pull the heat off it?
    if CF is outside tent, this is easy enough to arrange.

    also, intake should be pretty close to extraction.
    whats your rH? this affects temp too.

    *Key Advice: stop starting new thread for every question about the same plants.
    Start a diary & keep everything together. & easier for members to keep track of you.
    best of luck
    w

  7. #6

    Join Date
    Jun 2007
    Location
    My House made of Hash. Huff and puff and I might let you in.
    Posts
    1,049
    Thanks
    42
    Thanked 373 Times in 225 Posts

    Default

    That fan is a beast. I run a 600w and extract with one 125mm fan that I think moves about 400m3.

    Are you extracting the air outside or away from the room the tent is in?

    Sent from my HTC One M8s using Tapatalk
    Cheers Dru!!!

  8. #7

    Join Date
    Feb 2017
    Location
    up north
    Posts
    29
    Thanks
    1
    Thanked 47 Times in 19 Posts

    Default

    thank you jack
    yes, as i said, i'm a newbie and, till i know better, i will be posting a lot of crap
    and need to know when i am doing so, i didnt really know how to/what info to include in reply to the viz's question tbh
    please keep on doing so all, i sure appreciate it all


    yes, i meant 400W/600W

    tent is 2m high, 1.2 x 1.2 - the fact you say that my extractor will only do 4ft square tent aint looking good

    no i'm not using a fan controller, you see, i bought the kit in a whole package kaboudle as i had no idea what i needed, just took what they said i needed as... what i needed

    i have no idea about switching the ballast, just looked up what it may mean, 'Replace the ballast when your fluorescent light flickers or makes an annoying hum'.

    thanks wasat, yes,didnt realise that, i shall keep all posts about these on here from now on
    yes, point of extraction is right by the bulb
    rh? you lost me there

    thanks greengiant
    yes, extraction going straight out of permanently propped open window


    any help, as ever, gratefully received
    Last edited by celery; 20-03-17 at 11:46 PM.

  9. #8

    Join Date
    Jun 2007
    Location
    My House made of Hash. Huff and puff and I might let you in.
    Posts
    1,049
    Thanks
    42
    Thanked 373 Times in 225 Posts

    Default

    Your extractor is rated to swap all the air in your tent 11 times a minute. Less a percentage for friction / ducting. That's a lot of extraction. Do you have a passive intake? I.e a big opening in your tent somewhere to let new air get sucked in?

    Sent from my HTC One M8s using Tapatalk

  10. #9

    Join Date
    Feb 2017
    Location
    up north
    Posts
    29
    Thanks
    1
    Thanked 47 Times in 19 Posts

    Default

    here is what is inside anywayAttachment 342626

    ahh, maybe that it
    i have the air vents at the bottom clear
    but no big opening
    Last edited by celery; 21-03-17 at 12:01 AM.

  11. #10

    Join Date
    Aug 2016
    Location
    Stuck in a chair most of the time.
    Posts
    3,894
    Thanks
    5,158
    Thanked 10,015 Times in 3,459 Posts

    Default

    Right I wondered what had happened to you.


    You have more than enough venting power with your fan. Some would argue over kill. I would strongly urge you to invest in a cooltube for your lamp. Because you have so much power in your fan running a cool tube will not negatively impact one bit on odour control. A cool tube will help big time with temp management.

    Next point. Where are you pulling your fresh air in from?
    And, where are you venting your hot air too?


    Ideally you want your vented air to be exhausted into another space or outside. Your fresh air should not be coming from the same space that the exhaust vents the hot air into.

    If you are using like me a passive intake, you do not need to have huge openings. I simply use the one 8 inch sock at the bottom and stuck a bit of ducting in, pointed the ducting away from the door with a bit of a kink and some black stocking over the opening to manage the light and bugs wanting to get to the light.


    A variable fan speed controller might be something to think about budget depending. There are many options. I use a Evolution Controller for my set up, but there are plenty options.

  12. #11

    Join Date
    Aug 2014
    Location
    In A Land Of Make Believe
    Posts
    5,348
    Thanks
    13,324
    Thanked 13,342 Times in 4,903 Posts

    Default

    hi celery, heres a thot from when I was gnu.
    I took a few pics of inside & outside my tent.
    I tried to include where the light is, the CF, plants all the kit n stuff.
    I got some pointers on arranging what I had,

    rH = Relative Humidity. you measure it w a hydrscope usually including w cheapo thermometers
    its important to monitor humidity & temps.

    pics, lots of pics will get additional info for you. lots of us are innit for the pics

    if you make this your diary Ill sub & follow along.
    otherwise, post a link here to your diary & Ill sub to that.

  13. The Following User Says Thank You to Wasat For This Useful Post:

    M_C (22-03-17)

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Bonza Seeds - Over 2000 Strains!     |     bongs - herbtools     |     25% off Cannabis Seeds at Dr Chronic     |     buy a bong from Herb Tools     |     GYO Seedbank

THCtalk.com Disclaimer - You must be over 18 years old to view/use this site .THCtalk.com does not encourage growing Cannabis or possessing Cannabis. Learning how to grow Cannabis instructions should be for educational purposes only. All Information contained in this web site is for: Historical reference, Scientific reference and Educational purposes only. Visitors to this website are advised against breaking the law as It is illegal to smoke, grow, or possess cannabis in the UK