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From DEs to LEDs

Discussion in 'LED and other Lighting' started by greengrassgrower1, Aug 30, 2017.

  1.  
    ttystikk

    ttystikk Well-Known Member

    You might put the lamp on a kill-a-watt meter to see what it actually runs at.

    Lots of people put too much light in their grows, even the LED crowd. I've done it... Getting the balance right is an art.
     
    mr. childs and Moflow like this.
  2.  
    greengrassgrower1

    greengrassgrower1 Well-Known Member


    Thanks for the kind words Dr.

    I agree my G per w was low for HPS.. A couple plants didnt hit as well as they should have.. As far as turning them down i did to 750w and saw same to less results so i put them back to 1k.. Out of the 12 to 15 runs i did with the best was .86 per w. and they looked like this x 16..
    20150821_115802.jpg Now thats with a bigger yielding strain then i am running now..


    Back to the light source.. dollar for dollar if i were lighting up a big area i would go SE HPS.. HElla cheap and gives great results.. But for me in my 8x8 its about being efficient.. That means 2 things to me...

    Maximizing photons per Watts: QBs have the best output for the price IMO. 600ws of QBs = 1k SE.. = Savings on lighting and cooling cost.
    Maximizing photon delivery: looking at 1 HPS to 1 QB rig.. One light source vs. 4 boards.. The spread on the boards is ideal for an even coverage eliminating Hot spots..

    One other thing to note about the QBs and HPS is the head room that is needed. DE, i like them 3' to 4 ' away from the canopy and QBs i like 18" allowing you to grow much lager plants.

    All and all i am very impressed and excited as to what i can achieve with 2.4k vs 4k..

    Cheers,
     
    ttystikk likes this.
  3.  
    OneHitDone

    OneHitDone Well-Known Member

    You seem to be a straight shooter ;)
    Qb's at 18" to canopy vs DE at 3-4' - how is the development of the lower flowers under those two situations for you and how far total from the light source for each are your lowest down bag quality nugs?
     
  4.  
    greengrassgrower1

    greengrassgrower1 Well-Known Member

    Thanks OneHit - The only person i battle with over garden performance is myself.. Always trying to improve..

    I would say close to the same.. I mean if the lowers are getting light they will produce in both applications, and if they are being covered by the above canopy they wont harden up kinda fluffy..

    Here are some pics, keep in mind these plants are around 4'ish tall and i cleaned up the bottom 2'ish in week 2 or 3 of flower so the remaining canopy was thick and not much lowers..

    20171201_105046.jpg 20171201_105336.jpg
     
    sethimus, ttystikk, dannykay and 6 others like this.
  5.  
    Yodaweed

    Yodaweed Well-Known Member

    Those are the type gpw numbers that can be achieved with SE HID technology, also you never tried CMH lights? Problem with LEDs is they contain zero UV and nearly zero far red, so when it comes to producing resin they aren't really the best lighting solution compared to full spectrum lighting.
     
  6.  
    lukio

    lukio Well-Known Member

    lovely looking plants, man. dont listen to Yodaweed, most people have him on ignore.
     
    ttystikk and Humple like this.
  7.  
    rkymtnman

    rkymtnman Well-Known Member

    i think black dog up in Boulder also has some uv in their led fixtures. but their prices are outrageous per watt
     
  8.  
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    its just as easy to add uv to leds as it is to add it to hid....buy a reptile light, put it on its own timer...problem solved
     
    ttystikk likes this.
  9.  
    Yodaweed

    Yodaweed Well-Known Member

    Yea i just copy and pasted this off their website, if you search UV for cannabis you come up with lots of results supporting UV increases cannabinoid production, here's some more

    https://hightimes.com/grow/grow-hack-how-to-use-a-uv-lamp-to-increase-thc/

    https://www.royalqueenseeds.com/blog-could-uv-light-boost-thc-production-in-cannabis-plants-n314
     
    rkymtnman likes this.
  10.  
    Yodaweed

    Yodaweed Well-Known Member

    You don't need to add UV to CMH lights, or if you use MH/HPS combo....only LEDs need supplemental lighting due to lack of spectrum. They also need far red supplementation to compare to HID lights.
     
    OneHitDone likes this.
  11.  
    rkymtnman

    rkymtnman Well-Known Member

    i use the htg supply uv t5's. they will melt your leaves if used too much. i'd never do a run without supplemental uv
     
    ttystikk likes this.
  12.  
    Yodaweed

    Yodaweed Well-Known Member

    Yea i use a supplemental light when running only LEDs, but i don't run only LEDs anymore, waste of wattage when i can run my CMH.
     
  13.  
    greengrassgrower1

    greengrassgrower1 Well-Known Member

    Hi Yoda,

    I have never used CMH lights before.. What i have seen though from the Jungle boys and others is they kickass.. BUT for me im pushing for efficiency and QBs put out more photons per watt then CMH or HPS..

    From growing i cant see the loss in quality from the lack of UV from LEDs.. I do have some far reds in the room as a flower initiator not sure if they helped or not.. If anything i would say the LEDs produce the same or more resin.. Same goes for the terps.. I would also say the density is greater with LEDs..

    Now everything i just stated was off just 2 different runs containing 3 different strains.. So not alot of data just what i have experienced thus far so take it for what its worth..

    This Shurb cut is not the frostiest strain but what she lacks in frost she makes up for with loud gasy terps and rock hard flowers..

    Cheers,

    20171201_114149 (1).jpg
     
  14.  
    greengrassgrower1

    greengrassgrower1 Well-Known Member

    Thanks Lukio for the kind words :)
     
    ttystikk and lukio like this.
  15.  
    Humple

    Humple Well-Known Member

    I see the village idiot is back and up to the same old bullshit. Going on about resin, when many growers have seen for themselves that they get MORE overall resin (and terps) under COBs and QBs.

    As Lukio said, OP, pay no attention to Yodaweed. Easily the least respected member on this forum. He's always trying to school people on QBs, despite never having run them. Only reason I haven't put him on ignore is that I get a laugh out of his persistent ignorance.
     
  16.  
    Yodaweed

    Yodaweed Well-Known Member

    It's probably because you were struggling with temps previously, high temps can ruin the terpenes of cannabis, if you used a quality full spectrum light you'd see up to 30% more cannabinoid production, it's been scientifically proven.
     
    greengrassgrower1 likes this.
  17.  
    lukio

    lukio Well-Known Member

    haha! nailed it (:
     
  18.  
    greengrassgrower1

    greengrassgrower1 Well-Known Member

    Thanks Humple - I dont care either way. I just like showing my experiences with others.. Growing is a fun hobby with many ways for it to be done successfully.. No wrong way as long as produce the fire i guess.. :)

    Cheers,
     
  19.  
    Humple

    Humple Well-Known Member

    I hear you, man. That's the best attitude to have, for sure!
     
    lukio and greengrassgrower1 like this.
  20.  
    greengrassgrower1

    greengrassgrower1 Well-Known Member

    My buddy has a little 3x3 tent where we test out genetics before running them in our rooms. its powered by 360watts of CoBs CM22s 3500k..

    This is a lower node of Hot Rod by DVG she is a keeper.. :) 20171125_193427.jpg
     

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