DiY LEDs - How to Power Them

Discussion in 'LED and other Lighting' started by SupraSPL, Feb 22, 2014.


    coreywebster Well-Known Member

    You can run 5x cxb3590 on the hlg 240h-c1400 wattage is 250.06w you would be using 244w, voltage is 89-179v you would be using 174v.
    With the hlg 320h-c2100b you could only run 4 3590s each driver.
    So 30 x cxb3590s @ 1400mA would give you a ppfd of 581 in your 64ft square flower room. That's a bit low, @2100mA you would be getting a ppfd of 793 which is pretty good. To give a comparison, a top end HPS 600w in a 4x4 gives a ppfd of 690.
    So you would be lighting your flower room pretty good with the 2100mA set up, Plus your getting the benefits of multi light source and a better spectrum to boot.
    For your veg room you would be smashing it with the 1400mA drivers on 25 cobs over 48 square feet.
    Since you would need 7.5 x 2100mA drivers for your flower room you could go with 5x 320-2100 for the 3k cobs plus run the 10 3500k cobs on 2 240-1400 drivers, losing some light intensity of course.

    Rider509 Well-Known Member

    Does my design make sense?
    I built a modular system with 4 36V 3500K CXB3590s driven by an HLG-320H-C2100B driver per light bar. Sixteen COBs and four drivers for a system of one COB per ft2 in a 4x4. My thinking was that I could drive a single bar to 320 watts to cover a 2x4 space or dial them down for better efficiency when using all four in a 4x4 space. I'm using 140mm pinned heatsinks from Cutter and when the lights are driven to max the heatsinks are stable at 49 degrees C.

    I ask because I see so many four COB 3590 builds using lower amperage drivers.
    Last edited: Mar 12, 2017
    momo2015 and klx like this.

    coreywebster Well-Known Member

    That's a breast load of light dude. A whole bag of tits worth. Possibly too many tits in one bag.
    There is a point where more light is not producing more bud.
    The reason folks run the cxbs at lower amps is for the efficiency, the lower mA the better, but obviously more cobs are needed, although 16 cobs @ 1050mA is plenty so at 2100mA you may well be over egging the pudding. Be interesting to see how it works when you do a crop at half power and a crop at full power ect. Good to have the power if you need it and not use it if you don't want to.
    sixstring2112 and Rider509 like this.

    pop22 Well-Known Member

    4'x4' Just fired it up yesterday. Will be growing canna with it soon and I'll post a journal.

    swiftkillpapa and coreywebster like this.

    sixstring2112 Well-Known Member

    To answer your first question...nope ,overkill imo.sounds cool on paper.its going to be like running a de lamp in there @1250w which people just dont do.too many ponies not enough track.16 x 36v cobs @ 1750ma would be p l e n t y of light and you will probably want to dim those even.
    coreywebster likes this.

    Rider509 Well-Known Member

    That was the thought. 2100ma is still way under the design specs for the 3590 and allows for driving each of the four COBs/driver to 80W for a system total of 320W. Driver efficiency increases at a 70% to 80% load and only drops 1% at a 50% load (1050ma).

    I thought maybe I was missing something since so many DIYers and manufacturers run the same four COBs with lower amperage drivers.
    It has made me wonder what design criteria led to those choices and if I missed the boat somewhere.
    coreywebster likes this.

    Rider509 Well-Known Member

    I'm running some at 40W/COB (@1050ma?) over transitioning plants and have an even 40K lux spread. Canopy temps are +/-70F.
    Others I'm running at 80W/COB (@2100ma) over fully flowering plants and have an even 70K lux spread. Canopy is +/- 76F.
    Overkill? I'm new to LED so I don't know. No light bleaching though, which I heard was a possibility. I don't have a PAR meter but from rough calculations I'm near 640 and 1100ppfd.
    Last edited: Mar 13, 2017

    sixstring2112 Well-Known Member

    Im running Cree 3590 @ 34-35w per cob (1050ma) over 5 foot tall plants in flower with most fixtures @ 11 inch spacing some being as far as 14 inches.
    I also have fixtures at 50w ,62w and 75w same cobs,i.just dont see the advantages of anything over 50w in my setup.

    Ariesstoner91 New Member

    I believe you had a mixup my veg rooms has 30 4K cobs and 5 5k cobs 36v my flower room has 20 3k cobs and 10 3500k cobs. So I did little bit of research and came up with this for veg room mean well hlg 320- 2100 for 5k cobs and 6 240-1400 for 4K cobs. 5 320-1750 for 3k 2 320-1400 for 3500k. Just realized had wrong numbers in original post. I'm shooting for 820-950ppfd for each room. Anyone running similar setup?
    coreywebster likes this.

    Rider509 Well-Known Member

    5x36V=180V. The 320H-C2100 won't run five 3590s. The 1750 would be a good fit.

    For the veg room you'll be running five 5Ks, and six systems of five 4Ks. Each of those systems would run on a 320-1750B and allow you to dim to better efficiency.
    For the flower room you could also run groups of 5 COBs on the 1750s or go with four COBs per group and run the 2100s.
    Both the drivers and COBs run more efficiently when dimmed 70 to 80%.
    You should be able to negotiate a killer bulk discount.
    Last edited: Mar 14, 2017
    OLD MOTHER SATIVA likes this.

    Krynn Member

    Hi all, finally decided for this model to run 12 at 1050mA, is the best way?


    What driver would be better for this config?


    BostonPuff Member

    whats up guys, i was planning to do a roleadro blurple conversion to cobs, but thinking i may just jump in and do a straight DIY build...

    im a tad limited to this site:

    as I have not found many others that carry most or all of the products needed to complete a build.. but I still need some help and recommendations planning.

    Will be using a 4x4 tent set up, and not sure how many of which Chip to use. Plan on using the light for both veg and flower, so 3500k most likely, I think the components are somewhat more expensive here in Germany then you guys in the states, but I pay an additional 20% on orders coming from outside the EU.

    so need some recommendations for which chip, have 0 experience with DIY lighting, so the simpler the better, but I may have access to have a master electrician help me with the build.

    any info would be appreciated guys, was looking at CXB3590s but im not sure if something newer and more efficient is out already.


    homegrown365 Active Member

    Rider509 and BostonPuff like this.

    Rider509 Well-Known Member

    Sorry for the delay in responding. Running 6 of those Vero COBs on a 1050mA driver would give you about 50W per COB, so that works out well. To get up to 70W each you'd have to run groups of four on a 1400mA driver.

    GBAUTO Well-Known Member

    When I started to investigate how to build these things, I looked really closely at the CXB's until I started to read about the newest version of the Vero's or the Citizen arrays. One of the drawbacks of technology advance is becoming obsolete, virtually overnight. I ended up using the Vero SE because they were about 50% cheaper than the CXB and had better numbers-ain't progress wonderful...they all hook up the same so find the driver you want to use and fit the chips to that.
    coreywebster likes this.

    shiva71 Well-Known Member

    Gbauto, Im curious about Cree alternatives, could you please provide links to the Vero/Citizen cobs you mentioned? How many mA are you pumping through them?

    GBAUTO Well-Known Member


    GBAUTO Well-Known Member

    I use the Vero 29SE(36v) versions with a Meanwell 'B' type dimming driver-4 arrays/driver so it can do up to 320w/bar. I run them up to 2100 mA on my configuration. I know that it's possible to get better efficacy under-driving the arrays-that's why I dim when I don't need the penetration/best of both worlds for me.
    momo2015 and Rider509 like this.

    shiva71 Well-Known Member

    Cheers GB, much appreciated. Just had a look at the Kingbrite page and wow, there's a lot of different cobs...are people going for the 3 - 3500k range? What about CRI? I have built a nice small set up with 4 cxa2530s (fasttech have them super cheap at $10 a pop) which works well but still have a LOT to learn! Cheers :)

    KonopCh Well-Known Member

    Any difference between them?
    I look for dimmable driver to power 6x Citizen 1212 at 1.05A. I know A has build in potentiometer.
    This are my options...

    OLD MOTHER SATIVA likes this.

Share This Page