SupraSPL

SupraSPL

Well-Known Member From back east
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  • Ohwolfie
    Hey Supra, I know you probably get umpteen led questions a day but I've got one I cannot seem to find an answer to. Can you tell me what the efficiency of a Vero 29 4000k COB running @ 1050 milliamps is? I am going to run 5 of them on a Meanwell HLG-185H-C1050 driver, and I am trying to figure out whether or not I can passively cool them. Thanks in advance.
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    SupraSPL
    SupraSPL
    On paper it is 45.6% but in practice may be higher. No problem passively cooling them as long as sufficient surface area and fin spacing.
    J
    hey. i just wanted to thank you for the work you've put into the diy. tbh i've joined this forum just to read your post and just say thanks.
    Hexal
    Hey Supra

    I saw a chart awhile back that you made for a guy that said how many of 3070 could be put on various drivers. How many CXB3590's can be powered from the HGL-185H-C1400? I thought it was decently strong driver but I am half retarded and thats the good half lol. I have 9sq' I wanted 4-5 CXB's. Any options that may be better for me? Thanks in advance.
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    Hexal
    Hexal
    Ignore this - found the information in a previous post finally. But seriously, thank you for all you do.
    B
    I'm trying to find a xml2 diy veg light with 30 xml2 I have utfse and can not find one any help would be awesome!
    LG1
    Hey Sup's how can you navigate through all the Leds at Home Depot? I'm interested in the T8 LEDs for a 2x4x7'area for veg. They state the spectrums and wattage and there was one in the 3600k range at 44 watts. Is there a formula that you can do to figure out if the the light is sufficient or not for the area mentioned above? I'm currently using a 6 bulb T5 and looking to cut cost. Thank you
    P
    Hello Supra. I was thinking about turning a small cab into a micro grow with leds. I would have 2 chambers split between 55"h x 9"d x 21"w. I think i'd have about 1.3 sq ft per chamber depending on how i divide the chambers, not 100% on that though. So following 50w/sqft what would be the ideal lighting for each chamber? 10x10w @ 50% efficacy? Some 20s? A 50 or 100? All run at 50% to get close to 50w/sqft.
    S
    And thanks so much for all the data you have posted already! As many others before me have said, I couldn't have figured this out so easily without your help!
    M
    Hi Supra, I saw you mentioned needing the SPD of the 4000k CXB3590, and i believe that cutter does indeed have the info posted at this link: http://www.cutter.com.au/proddetail.php?prod=cut2811
    And one question, what is the par/w or efficiency difference between a 4000k and 3500k CXB 3590 (both top bin) driven at 1050 mA?
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    SupraSPL
    SupraSPL
    If you do run them soft, passive cooling is much more affordable and you can break the heatsinks into any size/shaoe that best fits your space. If you went with 15 CXB3590s @ 1050mA, tht would dissipate 555W at max, @ 66.3% that is 187W of heat into the heatsink. 187 heat W * 120cm² = 22440 cm² total required for the 4X4.
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    M
    mduke
    what is the $/PARw of 15 CXB at 1050mA. I see @ 700mA its $2.64, that's not bad actually.

    I understand the red will lower my overall efficiency but what I would like to know is how many red LEDs driven at both 700mA and 1050mA (with the appropriate numbers of COBs at each amperage to maintain 17-18 PARW/sq.ft.) will i need for each fixture?
    M
    mduke
    what difference in end product could I even expect to see between the 3500k and 4000k COBs?

    Do you know anyone using the 4000k COBS for flowering and what are their results? links?

    maybe i could do without the REDs.
    BIANCAADA6
    I'm kicking around the idea of using 2x2 aluminum tube cut 36" then wield both ends off. Then drill a 1/2 inch hole in both ends and thread attach a 1/2 inch line and water cool 4 chips. Has anyone to your knowledge done this or is it not going to work lol.
    BIANCAADA6
    I am relatively new to diy but a friend had a mw se-350-36 that I'm running 4 vero 29 parallel with fuses. Will this driver be OK to power this string? Not in full time use yet. Any recommendations would be appreciated.
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    SupraSPL
    SupraSPL
    Yes it looks like that should work.
    SupraSPL
    SupraSPL
    In theory, you might be able to use the voltage adjustment screw to protect the COBs. When the COBs are cool, you could reduce the voltage adjustment just above the point where the lights start to dim. So if one COBs ever burned out (unlikely), the driver will not be able to increase the current because the Vf of the COBs would have to rise and the voltage limiter will stop it from rising.
    ReddEyez
    Thank you so much for all of the info you provide for us all over the forums man. It is much appreciated. You saved me from buying another low quality light. Nothing but DIY from here on out. Thanks again man, take care.
    B
    Hey Supra, I copied your receipt of 4 Vero 29's, 3500K, using the Meanwell hlg-185h-c1400b in a module times 4. All modules are running on 700ma and 143 dcv. What can I do to get full current out of the driver? All modules are the same using 1400ma drivers. I have the pots installed on the dimming leads. The pots range is 1.4 ohms to 100 kohms.
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    SupraSPL
    SupraSPL
    Hello, I apologize I made that recommendation based on hearsay without doing my own testing and it looks like that configuration is not a great driver match. Unfortunately I cannot edit my post but I will ask mods if we can get that removed.
    SupraSPL
    SupraSPL
    The driver will put out more current as the COBs heat up, but still far below 1400mA. I am surprised it is as low as 700mA. My advice is take one of the Veros off the circuit so the remaining three can get full current. Another option, if you switch to CXB3070 or CXB3590 you will get full current.
    EfficientWatt
    Hi Supra,
    What do you think of the CXB3590 4000K DB cutter have ? I'm not sure if I should favor them for flowering over 3500K CD :/
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    EfficientWatt
    EfficientWatt
    Thanks for pointing this out, didn't realize they were 70cri :/
    For veg I'm going with cxb3070 5000K BD... good enough for me ^^
    EfficientWatt
    EfficientWatt
    I just realized : we do not have spd of 80cri 5000K and 4000K, do we ?
    So the LER numbers we are using are based off 70cri, or am I missing something ?
    SupraSPL
    SupraSPL
    Yes that is correct, the CREE sheet is based on 70CRi but there are 80CRi versions of the CXB3590 4000K and 5000K available, both 80CRi CD bin. I would suspect they have a lower LER and slightly higher QER (see Vero 29 4000K 80 CRi)

    I have a CXA3590 5000K 70 CRi and a CXB3590 5000K 80 CRi and you can clearly see the difference in the phosphor color, the 70 CRi is paler yellow.
    NWbordergrower91
    Trying to figure out how to calculate watts per sq cm for a passive heatsink. I know this of course all matters on what profile I get, but lets say for example sake I was looking to run a 50w cxb3590 CD on a 4.230'' or 5.88''. My idea was 40cmsq per watt? I have your spread sheets from heatsinkusa and the driver-cob sheet, but still not fully comprehending quite yet. Getting there! But still confused, thanks
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    SupraSPL
    SupraSPL
    So the recommendation is 120cm²/ Watt of heat. So in your example each COB will make about 23W of heat, requiring 2760cm²:
    4.23"X 17"
    4.9"X 12"
    5.88"X 10"
    7.28" X 8"
    8.46" X 7"
    10" X 6"

    Good luck!
    SupraSPL
    SupraSPL
    The wider the profile the more easily it can convect (10"X6") would be best for example). Not sure how much difference it would make in practice but worth mentioning
    B
    Supra, I am thinking of starting small and doing a PC case grow, with a canopy of 54cm x 23 cm, height of space of 50cm. What LED config/setup would you recommend, I've been thinking of CBX3590 CD 36v @ 700a?
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    SupraSPL
    SupraSPL
    Looks like that setup would give you 551 PPFD which should be great if you have relatively short ladies, but you could try 1050mA or 1400mA if you want to try and get more out of your space. Good luck!
    D
    Hey Supra, trying to build a 10x cxb3590 veg light running at 1400ma, and was planning on using the arctic 64 plus cpu coolers.. Problem is, everyone seems to be out of stock on them. Do you have any other options to your knowledge that work with the 3590s? Right now I'm wondering if I need to put in another order with heatsinkusa.
    bassman999
    I have a queston.
    Can I use ideal solderless with kapton tape?
    Seems like cob isnt touching HS, maybe bolting down is required to make it touch?
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    SupraSPL
    SupraSPL
    That is a good question, I have not experimented much with the holders but the guys in the holders thread could probably answer that.
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