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24 hour light vs. 18/6.

Discussion in 'Advanced Marijuana Cultivation' started by Sencha, Apr 27, 2010.

  1.  
    BobCajun

    BobCajun Well-Known Member

    I use the opposite of your flowering cycle. I use 13/11. I read that 12 or 13 hours produces more potency than 11 or less. Also yield is considerably reduced with 11. I saw one forum post somewhere in which a guy tested his weed grown with I think 10 hours and it was about 2/3 the potency of his 12 hour weed. Might have been 11 but I think it was 10. 13 is working well for me so far. Just started using it a few weeks ago though so can't really say for sure what the results are yet. Just seem to be growing somewhat faster.
     
  2.  
    a mongo frog

    a mongo frog Well-Known Member

    But doesn't veg still work on 24/0 at all stages of veg?
     
  3.  
    since1991

    since1991 Well-Known Member

    Who has really ripped the stains they are dealing with? Who has ran them seed 0lants at 18..ran the cuts at 24? What the fuck is there even a question?
     
  4.  
    since1991

    since1991 Well-Known Member

    I mean..really. What arw we trying to achieve?
     
  5.  
    since1991

    since1991 Well-Known Member

    If you stick to the general photoperiod of 12-12...give or take a few for "posting reasons "..cmon man
     
  6.  
    since1991

    since1991 Well-Known Member

    Its a c3 annual. Nothing yer gonna do to change that. Believe me...ive tried all the photoperiod bowshit.
     
  7.  
    since1991

    since1991 Well-Known Member

    Thank god weed will become fully legal before "they" come up with a photoperiod specific nutrient. Lol
     
  8.  
    RetiredGuerilla

    RetiredGuerilla Well-Known Member

    Sierra dude nailed it
     
  9.  
    Morriston55

    Morriston55 Well-Known Member

    Learned quite a big reading this thread start to finish.

    Hope Banagaman continues to post here

    I will be running 24/0 my next run during veg but dimming my mH bulb 75%
     
    mr. childs likes this.
  10.  
    mr. childs

    mr. childs Well-Known Member

    wouldnt dimming the mh 75% be more detrimental to the life of the bulb, than just buying a lower wattage bulb in the same kelvin temperature ?
     
  11.  
    SPLFreak808

    SPLFreak808 Well-Known Member

    This is one thing that can be difficult to test because different species may or may not react depending on its DLI and environment.

    24/0 with 200 watts of CFL's definetly had faster growth then 18/6 but lets be honest, the sunlight through a window will slap those bulbs silly. If my starving ass had to eat a slice of pizza by each individual molecule over a 24 hour period id be pissed lol but its better then starving.

    Anyone ever tried vegging with hps thouies at 24/0? At some point my plants will slow its photosynthesis and c02 usage because it can't use all that light. Try it, its possible your plants might wilt for a few hours every day before perking back up, you'll also possibly have more stretched bottom nodes, this is what happens in my room not sure about others
     
    Last edited: Jan 2, 2017
  12.  
    since1991

    since1991 Well-Known Member

    Ive vegged with 1000 watt hps lamps...YEARS ago. Expensive as all get out. Vowed to NEVER do it again...and i havent. I have stucl with 4 foot floro tubes of the t12 (way back) and the t5 variety for a long time. Its damn near the perfect veg lamp for me. Very uniform growth...very linear. That being said...iam fixin to jump into the world of LEC (CMH) lighting and iam buying q couple extra to slap on an old light rail i havent used in years for my veg room. See how they perform. People that have made the switch all say the same thing....t5's kick ass for veg...LEC's just blow up a veg room even more...and faster. I like what iam hearing. Also heard the spectrum in veg really compliments a silica additive. Like REAL strong branches amd thicker very healthy green leaves. And i do have an extra co2 regulator lying around...havent used it since i switched to t5's for veg. I think all three....LEC lamps on a light rail....silica additive (plus a good allround veg base nute) and co2 gas should be the trifecta...the holy trinity. How about you?
     
    Odin* and rkymtnman like this.
  13.  
    rkymtnman

    rkymtnman Well-Known Member

    what K LEC are you going to run? if you have the cash, use the 4k for veg and then the 3k for flowering. i went from a good LED (solar storm 400) for veg to a 4K LEC for veg. i went back to the LED for this grow and will have the LEC and LEd for flower. i think the mix of the red and blue of the LED was better for veg IMO

    i think a combo of 24/0 veg and silica is great. short nodes from the 24/0 and stronger cells from the Si. win.win.
     
    mr. childs and since1991 like this.
  14.  
    since1991

    since1991 Well-Known Member

    I planned on 2 of them 315 watt lec's from Sun Systems on a light rail in my 6x6 veg tent. And 6 to 9 of them in my flower room...replacing all my Gavita 6/750's. And yes..the 4000 Kelvin for veg and the 3000k for flower. But from what jve read...they both are bad ass for either veg or bloom. Also heard that after 2 years in a 12 -12 flower room...alot.of growers relamp but save the old bulbs for the veg room and they still veg EXCELLENT. Quite the savings...in power (ac too) and in relamping. They sound like the perfect lamp. We will see.
     
    mr. childs and rkymtnman like this.
  15.  
    since1991

    since1991 Well-Known Member

    If anyone is using air conditioning to cool an all lec lamp room..would you say about 1100 btu's of cooling per 315 watt lamp sounds about alright?
     
  16.  
    rkymtnman

    rkymtnman Well-Known Member

    not sure if they are perfect but they are way ahead of hps/mh. one 315 wasnt quite enough for 12 sq ft which is why i decided to run both the lec/led for my setup. but yeah, i got my lec kit for 200 last year. should have picked up some extras.

    how did you like the gavita 750s? i almost went that way instead of lec. i think i would have had trouble trying to cool it without going A/C. right now with the lec/led combo, i can keep it at 75 with just running an exhaust fan occasionally.
     
  17.  
    since1991

    since1991 Well-Known Member

    You pretty much need air-conditioning with double ended hps lamps....especially using more than one in a smaller enclosed space. Only so much one can do with vent fans and what not. Maybe cold air intake in winter but the warmer months...forget it. Ac is a must. When its 80 to 95+ degrees outside ....your not cooling any HID lit growroom without a.c.
     
  18.  
    since1991

    since1991 Well-Known Member

    The Gavita 6/750's are the bees knees. But like the above post says...you need a.c. And preferably of the mini split type to take advantage of a sealed room with a constant and stable supply of co2 gas. Hoping a bunch of lec lamps will drastically cut down on my cooling and overall electric bill and not take a huge hit on yields. In this game...ya gotta pay to play...but i need to pay less and play smarter.
     
    rkymtnman likes this.
  19.  
    rkymtnman

    rkymtnman Well-Known Member

    i hear ya. that's why i'm gonna try a few out in the greenhouse this year. let the Sun pay the bills.
     
    since1991 likes this.
  20.  
    SPLFreak808

    SPLFreak808 Well-Known Member

    Sounds like a nice room there. I have not used the 315's yet but I've used the 400's and yes it gives the plant that "outdoorish" look and structure.

    I think im a pheno hunting addict lol, I've been running a DE 1kw on 12/12 lately and ill just toss plants in the room not giving a crap about veg time.

    once i start vegging again I've got 2 superveg t5's & 2 pure pars ready to veg along side a 400w hps.
     
    mr. childs and since1991 like this.

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