COB LEDs

Discussion in 'Electronics Resources' started by Metalmann, Jul 28, 2013.

  1. Metalmann

    Thread Starter Active Member

    Dec 8, 2012
    700
    223
    I just ordered a few of these:


    http://www.ebay.com/itm/4-8W-COB-LE...85035?pt=AU_Lighting_Fans&hash=item35c74576ab

    I've been using the round COBs for a while, just wondering if any of you guys have tried/used these in a project?:confused:

    The round ones seem to put out a smoother, much better, all around light, for bench work. In cool white.:cool:
    Appears that these will be a lot more compact, for making strip work bench lights.
     
  2. LDC3

    Active Member

    Apr 27, 2013
    920
    160
    Since you need 5 of them to get the same brightness as a 100W incandescence bulb, do you connect then in parallel or in series?
     
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  3. Metalmann

    Thread Starter Active Member

    Dec 8, 2012
    700
    223
    They recommend hooking them up in series, but I just made one light using 4 of the round ones, in parallel, with no resistor.
    It's been burning bright for several days now, no problem.
    I'll add a resistor before I get everything mounted though, just to be safe.
     
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,769
    969
    series is always the best/recommended connection scheme for LED's to avoid possible thermal runaway.
     
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