Help Me Choose: DIY COB or Quantum Boards - 4x4 Flower Tent

If the cost of each lighting choice below was equal, which tech would you purchase?

  • HLG Quantum Board (550 or similar)

    Votes: 32 68.1%
  • DIY LED COB

    Votes: 15 31.9%

  • Total voters
    47

sallygram

Well-Known Member
I have
2 QB 288 with a 4x3 Scrog -2 plants
4 QB 304 with an 8x3 Scrog -4 plants
,3 Vero 29 with a 4x3 Scrog 2 plants
16 CLU048 with 2 8 x3 Scrogs -6 plants
,2 400watt CMH with 2 vert scrogs -8 total plants

(I was trying to do a side by side but ran into some health problems)

I wanted to give my 2 cents on this thread, first the guy from COBKITS.COM knows his shit and should be considered an expert (which I am not)

What I noticed so far, the QBs are nice because they spread the heat, they are simple to put together and produce some excellent bud.

The Vero 29s seem to be a little overpowered for the plants under them (285 watts recently dimmed down to 220 watts but the damage has been done) Super bright easy to build a frame with stuff from Home Depot and the soderless option worked well for me, however out all of my scrogs this one will yield the least for this run.
.
The CLUs are pretty new to my mix of lights, I am not sure how well they will yield but I needed some cheap lights and COBkits had them for about $8 each (I even used soder and old heatsinks and fans from my blupies-I am running them at 185 watts for a cluster of 4 COBs)

The 400 Watt CMH lights are however still doing great, they are going to finish a little faster then the others and the buds are nice and dense, heat is an issue but I still think I will do close to the same GPW as the COBs.

If money were no object I would probably go all QB304, but I think that now that I have the Vero 29 dialed in the yield will be about the same in the future.

However I am real impressed with the Gen 5 CLU048 chips running at 2700K. Because my illness came back I went with them due to my budget and I use crappy drivers with boosters so I can do a 185 watt light (4 COB) for about $68

If you go with the VEROs I would suggest using a cooling fan, I did the passive pin heatsinks and then later added an extra 12 volt fan and am now adding fans to all my passive lights including the QBs

My average grow is about 4 oz per plant (a few people have argued with me and said my plants are light starved) however it works well for me and the power savings from getting rid of my 4 1000 watt HPS lights is real nice. I think you will be happy with whatever you pick.

PS if you order from cobkits remember the discount code RIU.
 

bullisok

Well-Known Member
my latest LED build. 3 DIY LED Grow Light PCB – 90W from chil-led and 6 cxb 3590 Around 445w in whites, 75w in red and 42w in blue for a total watts of 560 for about a 5'x6' area. its in veg so reds are off right now. around $1,100 to make
 

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ANC

Well-Known Member
I'm just looking at upgrade possibilities. Currently running 3 COBs on each Meanwell hlg-240-54a
So the output is about 80W per COB. 54V @ 1.5A. What would be the most bang for the buck current gen COB to try in these positions?
 

CobKits

Well-Known Member
real hard to beat luminus cxm22 at bang for the buck. its $17 and the larger >$30 cobs are just barely edging it at 80W
 

ANC

Well-Known Member
Price up 3 cmx22s an HLG240-54, 3 x CPU coolers, and a PSU to run the 12V fans on the coolers.
2 of these rigs cover about a 5x5 and totals out at about 500W. These are the blocks we use with great results.
 

bullisok

Well-Known Member
I'm just looking at upgrade possibilities. Currently running 3 COBs on each Meanwell hlg-240-54a
So the output is about 80W per COB. 54V @ 1.5A. What would be the most bang for the buck current gen COB to try in these positions?
I think your best bet would be to upgrade it in two parts. first buy 3 more 3k or 3.5k cobs and run a set or two under that, save some money from them then add in 3 90w pcb's. Which would give you above 700w total LED for about $1000. I really like those pcb's because of the controllable reds and blues that i feel the cob's fall a little short on.

that is what i love most about the DIY stuff you just keep adding to it.
 

ANC

Well-Known Member
Will have to be cobs, using laser cut steel frame with holes cut out for cobs, So I am just looking to see if there is any thing better than the 22s @ 80W per COB.
 

Big Green Thumb

Well-Known Member
The Growmau5 pucks are just turned on by timer. Lots of guys have theirs start a bit before lights out simply because it's hard to make it exact using manual timers. I'm thinking about getting into arduino's since it's definitely the way to go....just takes time to learn it. Right now I'm working 12-14hr days, sometimes more so it's hard getting shit done. Looking forward to work slowing down come Sep/Oct.
Just an FYI, I found this reasonably priced 2 event digital timer that would work to trigger main lights and the far red pucks. I may have to buy one and a couple pucks. The benefit is it will use the same clock so you don't have to worry about separate clocks getting out of sync with each other.

https://www.amazon.com/gp/product/B01M31OP44/ref=ox_sc_act_title_1?smid=A2NOFZGOKNP3PJ&psc=1
 

SensibleSensimilla

Active Member
Nice. I like your setup. Sure seems like it would provide plenty of light and good coverage.

The HLG I ordered is supposed to arrive today. I'm excited to see what it can do. In the near future, I may mimic the exact setup you have, with the HLG in the center and COBs on the sides. What COBs are you running?
 

SoOLED

Well-Known Member
I still think mixing them is good, I'm really impressed with this HLG 260 @3k.

I'm going to get another one, and build around them. I may even stop using the CMH if this next run is in line.

they are awful to take pictures under though. where the CMH is the greatest to photo under....if that matters.
 
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