New to LED. Looking for COB Guru help

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HeadyYonder

Well-Known Member
Hey RIU! I'm not new at all to the forums or growing, just a new account due to security reasons. I was wondering if anyone here could help me with my quest for a new grow. I'll be moving shortly and need some help sitting up my new tents. I'm used to running 600w hps, have no clue about LEDs. Watched several Growmau5 videos on YouTube. His results and the lack of heat have really turned me towards LEDs. Anyways, the plan is to have a 4x4 tent in my new basement. I'm wondering if someone could help me desing my own DIY COB. I'd much rather build a fixture than pay the ridiculous money the hydro stores want, and I'm not new to DIY at all. I appreciate it if anyone is willing to help a fellow flower lover
 
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HeadyYonder

Well-Known Member
My budget is 500 tops for all the parts, shipping included. I just need some general guidance on building a fixture. I run organic soil mixes in 5-7 gallon pots, topand lst to even canopy. I would like to still pull an elbow and a qtr at minimum from a 4x4. Please all you LED nuts, help convert me
 
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VegasWinner

Well-Known Member
16SF x 50W/SF = 800W. You will need 8 CXB3590, 36v, 3500K, 80cri, for $480, plus assy, $50, 2-HLG-185HC1400B meanwell drivers $128, 2 5.88" x 48" heatsinks for $120, S&H $80, wires, nuts, bolts, etc. $60 = $860 lowest price to meet your need. peace
 
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HeadyYonder

Well-Known Member
That has the same output as my old 600watt? I was under the assumption that I could run lower wattage with leds and not saccrifice yield. Thanks for the response, very detailed and pretty much exactly what I was looking for!
 
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HeadyYonder

Well-Known Member
VegasWinner said:
16SF x 50W/SF = 800W. You will need 8 CXB3590, 36v, 3500K, 80cri, for $480, plus assy, $50, 2-HLG-185HC1400B meanwell drivers $128, 2 5.88" x 48" heatsinks for $120, S&H $80, wires, nuts, bolts, etc. $60 = $860 lowest price to meet your need. peace
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Also, is it possible to pull that yield in a smaller 3x3 or 3.5x3.5 area? I've only ran in a (huge to my standards) 5x5 and a walk in closet, not much experience with smaller spaces besides vegging area
 
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HeadyYonder

Well-Known Member
Maybe a better question I should ask. What kind of coverage can I expect from a $500 budget? And I'm confused as to why I would be using even more wattage than with my hps. I'm sorry if I'm a bit annoying or asking noobish questions. I'm not too electronically inclined and LED jargon confuses the hell out of me. Thank you all for the responses though, they're very much appreciated
 
dandyrandy

dandyrandy

Well-Known Member
I run ~600 w in 11 sq ft of space. I get over 1000 g of buds from 4 plants. You can get a vero 29 build much cheaper. The problem is less cobs less even light spread. I ran 16 vero 29's. Work great. Approximately half the cost to build as far as the emitters. Think of taking your 600w lamp and if you could distribute 16 points of light instead of 1. Look around and read. Depending on your grow area there are many possibilities.
 
dandyrandy

dandyrandy

Well-Known Member
Check out my 3590 retirement thread. Ongoing grow. I don't post much. So many real growers here to follow.
 
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VegasWinner

Well-Known Member
HeadyYonder said:
Maybe a better question I should ask. What kind of coverage can I expect from a $500 budget? And I'm confused as to why I would be using even more wattage than with my hps. I'm sorry if I'm a bit annoying or asking noobish questions. I'm not too electronically inclined and LED jargon confuses the hell out of me. Thank you all for the responses though, they're very much appreciated
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It is not watts you are seeking, it is PPFD. For the above design, 4 X 4 area = 16SF, 8 COB's x 50.4W = 403 Wd,, 403.2 Wd X .0563 = 227 PAR Watts/16SF = 14.18 PAR W/SF x 4.65 x 10.76 = 735 PPFD, the sweet spot for the best growth and efficiency. Cutters price is the best price and you only have to buy some aluminum angles to make a mounting frame. peace
 
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HeadyYonder

Well-Known Member
VegasWinner said:
It is not watts you are seeking, it is PPFD. For the above design, 4 X 4 area = 16SF, 8 COB's x 50.4W = 403 Wd,, 403.2 Wd X .0563 = 227 PAR Watts/16SF = 14.18 PAR W/SF x 4.65 x 10.76 = 735 PPFD, the sweet spot for the best growth and efficiency. Cutters price is the best price and you only have to buy some aluminum angles to make a mounting frame. peace
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Thank you Vegas! Much appreciated. I'm gonna be low on the funds for this build so might gradually acquire the pieces. Or just build a few of those smaller fixtures until I have the guap.
 
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HeadyYonder

Well-Known Member
VegasWinner said:
Start out with a 4-cxb3590 36v 3500/5000k with 1-HLG-185H-C1400B and a6second unit as money progresses. Peace
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Thanks a bunch man, I really appreciate the setup knowledge. If I were to use the 3x3 setup 6 CXB3590 36v mixed spectrum am I still gonna use the hlg-185h-c1400b driver? And also what are considered standard yields for leds as in g per watt. Actual wattage of course. Growmau5 videos shows him pulling something like 1.5-1.84 which seems quite ridiculous lol. I know it's a dreaded question on here cause of the many variables, but I was looking through old icmag threads where people were saying they were only pulling like .34-.5 g per watt which seems stupid low to me. Like why would people switch over to a more expensive initial setup to get low end results. Thanks in advance for any info you can pass my way
 
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VegasWinner

Well-Known Member
The modular build is 4 cobs with a c700b or c1400b depending on voltage of cobs. If you do six you would have to find a driver that would not be reusable over the period of your use. I would plan two four cob fixtures as money comes available. Peace
 
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HeadyYonder

Well-Known Member
VegasWinner said:
The modular build is 4 cobs with a c700b or c1400b depending on voltage of cobs. If you do six you would have to find a driver that would not be reusable over the period of your use. I would plan two four cob fixtures as money comes available. Peace
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That's my plan man. Is cutter really the best place to source the drivers and COBs? I was making my order up and noticed the drivers are in back order. I live in the states and was trying to get started building in two weeks or so. Sorry for all the damn questions, I feel like I'm learning how to grow all over again lol
 
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