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DIY with Quantum Boards

Discussion in 'LED and other Lighting' started by robincnn, Nov 19, 2016.

  1.  
    Humple

    Humple Well-Known Member

    Basically, you can go with 3000k, 3500k, or 4000k for an all-around seed-to-harvest light. Most here seem to go for 3000k or 3500k. Don't sweat it.
     
  2.  
    kdt15

    kdt15 Member

    gorgeous! can you recommend a guide for just making your own qb with light strips (samsung f series im looking at). roujghly know how much strips i need but not how many drivers, wiring, and heatsinking (where would i get a heatsink and what to consider)?
     
    HamNEggs likes this.
  3.  
    kdt15

    kdt15 Member

    appreciate the tip, as a full nerd/ocd perfectionist, glad to know i dont have to worry about this. i was told that the weed would look or taste funny if only given one spectrum since its getting too much of 1 type in comparison with HID's that supposedly give full spectrum
     
  4.  
    Budzbuddha

    Budzbuddha Well-Known Member

    4000k is kind of a tester .... 3000k is my main spec to run ... I have 2 other rigs at 3500k , no issues ( or complaints ) .... There are some side by side grows that illustrate some differences ( ledgardener did tests ) to see if there is any real difference. They are a LITTLE different ( strain growth ) but most builders here like the 3000k spec as preferred.....

    3000k / 3500k / 4000k are all good choices for growing. The 4000k best represents the color spec of sun at 12:00 high noon .... 3500k has a bit of blue , 3000k a bit of red.

    I only added as I can start seedlings with that panel dropped down above a tray .
    That single light would carry new seedlings into veg then I could fire up other 288 rig with 3000k for veg/flowering - so it's function then would be supplemental. I have one more 288 3000k rig that I have not built yet because I was interested in 4000k panel to test.

    Temps are remarkably controlled ... Proper air movement is really all I use. Temps vary from 68° to 83°ish depending on power used and environment. Tents tap out around 86° and I only use oscillating fans . Some Power hungry guys are throwing panels / cobs / strips and LEDs in custom rigs , so those types will be different. Regular QBs under average load are warm to touch ... Not like a hot plate ..... Lol .

    One COULD add a clip fan angled from tent support to blow across panels if desired.

    image.jpeg image.jpeg
     
  5.  
    magik1953

    magik1953 Active Member

    Is it possible to veg under a 135w QB 3000k ..... was thinking that this may work dialled down or would it be best to get the 65w light?

    Magik
     
  6.  
    Budzbuddha

    Budzbuddha Well-Known Member

    Yes you can .... Depending on grow space ... Say 2x2 or 3x3 size.
    It will grow in either with good results , but for a 3x3 a dual QB would be better.
     
  7.  
    magik1953

    magik1953 Active Member

    Thanks mate. Yeah my space is 2x2 so will use 135 for flower as well.

    Does anyone know what watt to use for veg?
     
  8.  
    pop22

    pop22 Well-Known Member

    I meant to be effective, you'd need to mix 3k, 4, etc on one board. I've not use 5k, i prefer the universal ability of 3000-4000k. Actually, the Samsung 4000k looks to have a good spread of spectrum.

     
  9.  
    stawawager

    stawawager Well-Known Member

    The science says it'll help or make a difference. And I'm sure you'll find some guys who will swear by it. But I'm not in that League.

    The biggest obstacles are making sure you have good water, air circulation and recirculation, the right temperature, nutrients. Without those you won't have great success.
     
  10.  
    MedMonkey

    MedMonkey Member

    Here's a stupid question as I wire these up and second guess myself... I'm wiring 2 qb288 boards to 1 hlg-320h-c2100b driver. Does it matter which side of the board I put the positive/negative from the driver to? Looking at the diagram on the hlg site for 2 boards in series the wires from the driver are hooked up to the top left positive and bottom left negative. Does it matter in any way if I connect to top right positive and bottom right negative? Hopefully that makes sense, but if not I'll try again when the meds wear off

    Basically I want to do the same configuration using the positive/negative on the other side of the boards.

    Is there any need to ground the frame? I'm thinking no, but I'm being told maybe by one person
     
    Last edited: Feb 8, 2018
  11.  
    MedMonkey

    MedMonkey Member

    As soon as I get this done I'll be ready to go. I want to be totally sure I'm wiring them correctly because I can't afford to ruin one of these boards or drivers. If all goes well I'm going to order 4 more boards (if they're in stock) and add 2 to this frame for the 4x4, and put 2 in a smaller tent.
     
    Last edited: Feb 8, 2018
  12.  
    kdt15

    kdt15 Member

    glad this forum is here, at other places/blogs/sites theres a lot of 5000k thrown around. any comments on 5000k?
     
  13.  
    kdt15

    kdt15 Member

    need driver suggestions:

    Referring to guide here: http://ledgardener.com/samsung-lm561c-build-finishing-touches/

    for my personal build, i am looking at ~80 of the samsung f-series lm561c 1.12A/46V strips.
    constant current in series is what i read to be best.
    I was recommended by digi key to go with the hlg-480-c1400a ones since their max voltage allows me to stack 7 in series on one driver, although a little higher in current/heat due to 1.4a vs 1.12a

    any thoughts on this, or other recommendations for drivers? i guess this calculaation was built just based on (max voltage of driver) / (voltage of driver)
     
  14.  
    Humple

    Humple Well-Known Member

    Personally, I'd consider 5000k only for a dedicated seedling/clone space. For me, any space in which I veg could also be purposed for flowering. When even 3000k can veg like these things can, there's just no sense in tying up a space with a veg-only light. This is just my personal preference, of course.
     
    pop22, 619kt619 and hillbill like this.
  15.  
    420Barista

    420Barista Well-Known Member

    I have 2 288QB's in 5000k I use for a veg light for mommas, seedlings, and clones. 5000k is the equivelent to the mh HID bulb spectrum.
    2700k, 3000k, and 3500k are best for flower time.

    the bottom line is this how many tents or rooms are you getting lights for? if your only getting one tent then a 3000k is good for the whole grow. if your gonna have a veg only tent and a few flower tents for a perpetual setup then id say 5000k for the veg tent.

    or yeah like humple said right above this
     
  16.  
    kdt15

    kdt15 Member

    Mothers use veg and not grow nights? Interesting, why is that?

    I'm going to have two rooms after testing a few grows. If I do use 5000 for veg, would it be better to get 3000 or 3500 now?
     
  17.  
    420Barista

    420Barista Well-Known Member

    mothers are for getting clones off of. they never go to bloom till you say they are done as mommies. so while they are mothers they are vegging
     
  18.  
    kdt15

    kdt15 Member

    Ok good to know. What do non led folk do? They're lights are more full spectrum right?
     
  19.  
    619kt619

    619kt619 Well-Known Member

    there are two positive and two negative connectors on one board. you can use them in a configuration most appropriate for your build, and no it does not matter which one you use. You can't damage the driver or the board from an improper wiring in series, If the circuit is not complete the boards will NOT turn on and your driver knows not to send everything it has got. You could potentially damage drivers from wiring the (VO + and -) together, but I am pretty sure the driver has a fail safe for that too.
     
  20.  
    619kt619

    619kt619 Well-Known Member

    Yeah if you like IR and other non-photosynthetic spectrums. Not saying they are all bad. But I personally like not having those from my light source and supplementing targeted spectrums that are known to have beneficial effects
     
    Mohican likes this.

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