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Have any of you DIY COB Growers finished a crop under 1000W DE HPS? - POLL

Discussion in 'LED and other Lighting' started by OneHitDone, Sep 7, 2015.


Have any of you DIY COB Growers have actually finished a crop under 1000W DE HPS?

  1. Yes

    30 vote(s)
  2. No

    77 vote(s)

    captainmorgan Well-Known Member

    People get dug in defending their decisions. I've actually recommended staying with HPS to certain people under certain circumstances or maybe going CMH. There's no right answer to fit everyone but saying it doesn't make sense financially is wrong in most cases,people can be short sighted when it comes to costs.

    ttystikk Well-Known Member

    What drove me to COB LED was the rude shock of discovering my '860W' lamps were actually devouring 1100W apiece from the wall!

    I'd never been happy with the quantity of light they delivered, and that added to my frustration; here I am paying the outrageous power bill and yet I'm still not getting what I should be?

    That was when I hatched a plan to match, watt for watt, the old draw with COB LED, a tech I'd stumbled upon in the threads here last summer. The system came together and is now on its maiden voyage, and so we shall see what the head to head difference really is.

    I'll likely need a few runs to get things like nutrient mix and strength sorted out, and by then will have a dataset worth comparing.

    BOBBY_G Well-Known Member

    people continually tell me im crazy that LED tech can pay for itself in weeks.....
    assuming you are heat or power limited, and pushing all you can out of a space, its quite easy to cover the cost of your gear in weeks with a very attainable increase in yield, on the order of 15-30%
    ttystikk likes this.

    Stephenj37826 Well-Known Member Rollitup Advertiser

    Mongo if you are doing that right now with hps in a 4x4 you will easily do what your going for with 800 watts in a 5x5..... Actually you'll do much better. All things being equal to what you are currently doing I can see you hitting 2.5+ .....
    We should get together and I will help you build this light we are talking about.
    ttystikk, bicit and Michael Huntherz like this.

    Trippyness Well-Known Member

    Indeed, all of what your saying makes perfect sense. Seems all the COB growers refuse to have a educated debate.
    Great yield. Like I said COBS work amazing for smaller environments.
    They however are not good for commercial warehouses.
    If running smaller enviornments, 50 x 50 or smaller COBS are the way to go no doubt.
    I am not against cobs and applaud your grow.
    Also how long of veg and how many plants?

    Trippyness Well-Known Member

    Please do back up your claims. Again I am here to get the correct info, but from the numbers. Its just more expensive to run cobs in a commercial setting. Smaller grows will benefit for sure.
    Michael Huntherz

    Michael Huntherz Well-Known Member

    I don't feel a need to support anything I say here, especially not to you.

    A bunch of growers who have actually grown with COBs, unlike myself, have posted a bunch of data already. Your self-enforced ignorance is your own problem to solve. I made a post about why that's true, and I even quoted it in a follow-up post. You clearly did not read it with the intent of comprehension, you read it with the intent of picking it apart.

    Like it says in my signature, I can read teh graphs. You either can't or you refuse to.

    I suggest you improve your reading comprehension in order that you might be able to comprehend the evidence already presented, instead of asking for more evidence. You are willfully ignoring extant data, why would I take the effort to post more data for you to ignore? (Don't answer that, just think about it.)

    Okay, damn it...

    Here's something to think about: The HID units currently heating this hypothetical warehouse, which you have claimed would require supplemental heat when HID units are replaced by COBs, are not designed for heating the air. That's right, HID is not purpose-built as an HVAC heating system.

    Do you know what was purposefully built as an HVAC system?
    The HVAC system.

    There's my support for my claim. Using an efficient HVAC system (Note that any HVAC will be more efficient and controllable than an HPS bulb and ballast, please.) to heat the building will reduce your heating costs compared to a bunch of HID lights. The more control the HVAC system has of the ambient air temperature the lower the overall cost will become.

    You offered zero support for your initial claim, which I was refuting, by the way.

    I've now supported my claim, try refuting it. Best of luck.
    Last edited: Mar 16, 2016
    ttystikk likes this.

    sixstring2112 Well-Known Member

    i dont even get this whole arguement about led and heating buildings lol.heating is always way cheaper than cooling,not to mention most the newer minisplit a/c systems have heat built in as well.but i do wish the guy who said he had 3100w of cobs in one spot pulling 1.5gpw or whatever at least posted some pics.
    oh if you want heat in your warehouse grow just hang a few mars 1600w panels in there and that bitch will heat right up for ya's just like hps lol.

    ttystikk Well-Known Member

    If this is NOT the case with a crop worth several thousand dollars a pound, I'd say the problem lies somewhere besides the lighting! People hate to admit they fucked up or just suck at growing, lol
    kmog33 and Michael Huntherz like this.

    ttystikk Well-Known Member

    Lol, dude. Buy some of their chips and grow with them; it's a MUCH better investment!

    ...and don't tell me I don't know what I'm talking about, we already had the financial analyst's conversation. In fact, on my own due diligence, I discovered that Cree's total sales amount to about $3B/yr. That's small enough that a billion dollars a year in sales to the indoor horticultural market would mean a huge boost in their sales, enough that it would make good fiscal sense for them to dedicate plenty of time, effort and resources to fulfilling our specific needs.

    Next earnings call, you might share that idea.
    mc130p, bicit, PSUAGRO. and 1 other person like this.

    cdgmoney250 Well-Known Member

    Here you go...








    Snow Cap

    cdgmoney250 Well-Known Member

    Pretty much what most of it looked like... Far from a perfect round with LOTs of room for improvement with both quality and yield.


    PSUAGRO. Well-Known Member

    WOW^^^^^^^^^^^^^^^^^^^..............................congrats grower:clap:
    Last edited: Mar 16, 2016
    Michael Huntherz

    Michael Huntherz Well-Known Member

    Nice work.
    edit: lol, hate on that.
    Last edited: Mar 16, 2016
    Michael Huntherz

    Michael Huntherz Well-Known Member

    Damn your Vulcan logic!
    ttystikk likes this.

    ttystikk Well-Known Member

    Interesting hypothesis.
    You keep asking people to prove their side, sooooooooo
    Where's YOUR evidence? o_O

    OneHitDone Well-Known Member

    Do any of you have an example of a non-scrog cob grow? Similar to Subcool's quadrant approach?
    Are cobs best suited to scrog growing?
    ttystikk and sixstring2112 like this.

    Trippyness Well-Known Member

    The main point of this debate is support your claims. If your not gong to do that there is no point in being here.
    Again, COBS are efficient, but the price is 2-3x a DE with the same yield. Sure you spend some on HVAC, but with COB you spend on large scale heating. Evens itself out.
    Have no ides how you cannot run numbers.

    Trippyness Well-Known Member

    COBS are for sure better for SCROG, they work with medium tress, but scrog is best.
    They jut are not worth the small savings over time via ROI

    Trippyness Well-Known Member

    My numbers are in a post a few pages back.
    I will come up with a much more detailed numbers based upon electricity HVAC, heating for both sides and we will see how close they are. Seems most of you COB growers refuse to supply any proof other than GreenGene.
    Like I said, COBS are great, just not worth the price at all for large grows.

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