DIY with Quantum Boards

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


    907guy Well-Known Member

    Why not go with a 54v driver and run in parallel?

    kcir916 Member

    Alright my kits came. I have 2x260kits.
    Instructions written said qb304 4000k spectrum to hlg240hc1050a and qb288 3000k board to hlg240hc2100a drivers.

    My question. To my knowledge I should wire the qb304 kit parallel and the 288 kit in series?

    GardenGuy Well-Known Member

    thanks @greg nr

    then, isn't it better to go for the 240-54 for parallel and more future proof rig? just like @907guy said.
    greg nr

    greg nr Well-Known Member

    That's a question for one of the real builders on here. ;)

    I don't think it matters electrically though. Your driver can't put out any more current as you add boards no matter which you go with, so you end up with the same light spread out over more area. If you just want to add a 5th board in the future, then the constant voltage is a better choice. You would have to go to 6 if you went constant current.

    But my guess is that after 4 boards you would want to add a new driver anyway to get more light.
    robincnn likes this.

    robincnn Well-Known Member Rollitup Advertiser

    Mohican and kcir916 like this.
    MMJ Dreaming 99

    MMJ Dreaming 99 Well-Known Member

    robincnn likes this.

    GardenGuy Well-Known Member

    i'm waiting for 3 qb288 and i was thinking of maybe adding a 4th board for better spread and lower temps. 20"x40" grow space.
    MMJ Dreaming 99

    MMJ Dreaming 99 Well-Known Member

    What is the least expensive way to do a 4 board QB setup? The kit is $149 so 4 of those is $600.

    I need to beat a SE 1000 Watt HPS and I am trying to keep cost, heat and power consumption down. I need at least 6 rigs so this is why I am cost concious.
    daone likes this.

    brewbeer Well-Known Member

    Buy a single driver separately from the boards and heatsink, could save about $80-100 over buying 4 kits, each with its own driver.
    MMJ Dreaming 99 likes this.
    MMJ Dreaming 99

    MMJ Dreaming 99 Well-Known Member

    Thanks. Is there a driver big enough for 4 boards? 320?
    Stephenj37826 likes this.

    Danielson999 Well-Known Member

    If one driver fails, it's nice having 3 more still running. Not everybody has a backup light ready to throw in. Just something certain people might prefer. Not to mention that you're dealing with far fewer volts with 4 individual drivers.
    MrTwist1 likes this.

    brewbeer Well-Known Member

    MMJ Dreaming 99 likes this.

    brewbeer Well-Known Member

    Agree, but it's a few bucks more than using a single driver.
    MMJ Dreaming 99

    MMJ Dreaming 99 Well-Known Member

    Nothing with QBs yet. Is 288 or 304 the number of diodes on each board? My goal is to try to match a SE 1000 watt HPS. I am running SE Hydrofarms with 8" ducts and 1000 watt HPS.

    The results are good but summer is here and QBs seem to be the way to go. Tired of heat, power use and the rest.
    ttystikk likes this.

    ttystikk Well-Known Member

    I'm happy with mine.
    robincnn and Stephenj37826 like this.

    Evil-Mobo Well-Known Member

    IMG_20170420_034356.jpg IMG_20170420_034725.jpg
    Last edited: Apr 20, 2017

    robincnn Well-Known Member Rollitup Advertiser

    pre-sale started 9am. Orders ship in 2-4 weeks

    2x 260 Kits, 595 with domestic shipping
    Mohican and MMJ Dreaming 99 like this.

    Gazooo Active Member

    Hey guys,

    finally got mine (6x QB288s) but i got a problem. There is neither a Vf-draw printed/written on the boards, nore is there a checkmark in one of the lightcolor-checkboxes (i ordered 3Ks).

    The only info that is written on the board is "BQ 288 18x16 test at 2100mA" (Batch from 10th March '17)

    Anyone has a suggestion on how to figure out what Vf the boards have? (I have a multimeter, that's it pretty much :)
    dro-man80 likes this.

    robincnn Well-Known Member Rollitup Advertiser

    @Gazooo entire batch has same Voltage bin. No need to match Board Vf if using same Spectrum boards from same batch.

    If you want to calculate VF of each board, each board at a time. or you can hook them all up too. eye protection.
    always wire the LED and then power on. connecting Board/LED/COB to a powered ON Constant current driver can cause damage Board/LED/COB
    Mohican, ttystikk, JustMeds and 4 others like this.

    Gazooo Active Member

Share This Page