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Led Users Unite!

Discussion in 'LED and other Lighting' started by project fuoro, Sep 11, 2009.

  1.  
    hillbill

    hillbill Well-Known Member

    2x2 feet or 2 sq feet?
     
  2.  
    questiondj42

    questiondj42 Well-Known Member

    I need to add lights. I've got a bunch of cobs, but the QBs look pretty nice.

    Should I get a 4x3590 CXBs and run them at 200W or should I get 3xQB288 ?
     
  3.  
    GBAUTO

    GBAUTO Active Member

  4.  
    TheHero

    TheHero Member

    1) Is that possible that CXB 3590 3500K 80 CR DB is not possible to found on mouser or arrow, but alibaba sells them?

    2) If I want to run my COB on 30W, is it good to put it on a heatsink, that is provided for for 100W?
     
    Last edited: Sep 12, 2017
  5.  
    PIGUNIT

    PIGUNIT Member

  6.  
    nightkiller

    nightkiller Active Member

    Hey guys, I plan to create a led fixture with 4 vero 29 gen 7 C 3000k 80 cri, can anyone help me with choosing what driver and how many watts to use. Im lost to why people dont use higher w and ma, that in my starter eyes looks like would be more efficient.
     

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  7.  
    nightkiller

    nightkiller Active Member

    Like, wouldnt the most efficient way to run them be 254.6w in each like the maximum in the table ?
     
  8.  
    TheHero

    TheHero Member

    You can see in that table - the lower the current, the higher is efficacy. My thoughts are - buy as much cobs as you can afford and run them on lower amps.
     
  9.  
    nightkiller

    nightkiller Active Member

    Im in Brazil so Im trying to buy as less amount of equipment because it will need to be imported from usa. So wouldnt I get more out of my lights (even if spending more money in energy) running them 3500ma?
     
  10.  
    nightkiller

    nightkiller Active Member

    Cant I run 2 in the HLG-480H-C3500 or 4 in a 2100?
     

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  11.  
    TheHero

    TheHero Member

    If you do not care about electric bills, use less cobs and run them on higher amps.
    Get bridgelux simulator tool, look at voltage and amps. If driver has, for example, range 50v - 100v, then you can run everything within this range, for example, 3 x 30V leds, 2x 26V, 1x 90V etc.
    I do not know anything about Veros, but as I can see, You could run 2x cobs (68V (i guess)) on c2800 (maximum power can be used on this driver).
    2x cobs wont run on c3500 , because it would exceed drivers 137V range. (You could run one cob on this driver @ 3500ma)
    and c2100 could run 3x veros at their (veros) maximum power.
     
  12.  
    nightkiller

    nightkiller Active Member

    But to run maximum power wouldnt the ma also be in the same as v ? Like in the table of vero that I posted earlier. The maximum would be 3420 ma - 74.4v - 254w
     
  13.  
    TheHero

    TheHero Member

    Yes, and 74.4 x 2 = 148.8V and that c3500 version can supply max 137V and "weaker" option could run both but not close to 3500ma.
     
  14.  
    TheHero

    TheHero Member

    Turned on 10x cobs @ 0.8 amps in a 1.80 x 1.70m x 1.80m room (test mode). No intake, no exhaust. In one hour temperature built up from 19 to 24 celsius. Will leave for a night and see what happens :D I use 180mm (1 heatsink for 1 cob) passive coolers. The largest I could get on kingbrite. Please, pray for my room, so I dont end up with 30 or more degrees tommorow :D
     
    Michiganjesse likes this.
  15.  
    Diskokobaja

    Diskokobaja Well-Known Member

    guys whats you opinion on telos from grownorthern? https://gn.uk/
    I remmember that someone said that xp3 cree or how is it called are specially made for growing..
     
  16.  
    PSUAGRO.

    PSUAGRO. Well-Known Member

    It's a nice passive fixture with some great single emitters, proven R/W spec........ don't like the secondary optics imo. Someone had a journal going on in here? I think ? couple of months back.
     
    Diskokobaja likes this.
  17.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    room temp is entirely dependent on the wattage you put in there and the biggest heatsinks in the world wont make it any cooler
     
    Diskokobaja likes this.
  18.  
    Diskokobaja

    Diskokobaja Well-Known Member

    I know that,my 400w of cobs raises my tent temp by 6.5c
     
  19.  
    Treebeard31

    Treebeard31 Member

    I'm currently on day 60 from seed using 5 100watt led a19 bulbs and 2 90 watt par38 blue and red led spotlights all on clamp lights it's all cobbled together but It works fantastic. This is my first ever grow and she's coming along alright!! can't wait to actually get a full spectrum setup!
     

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    Xs121 likes this.
  20.  
    Xs121

    Xs121 Well-Known Member

    pop22 likes this.

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