All Reefbrite LED worth it?

Discussion in 'Equipment' started by Gonzo, Aug 10, 2010.

  1. eldiablosrt8

    eldiablosrt8 Sponsor

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    It is voltage
     
  2. tuberider

    tuberider Guest

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    See I didn't even pay atttention, I looked it up and from what I can tell it around 1.75 watts per LED, I'll take my Kill-a-Watt with me today and see if that's a fact.

    BTW, I'm 99% certain they are Cree LEDs, or at least that's what Jake said in his RB post...
     
  3. GreshamH

    GreshamH Guest

    Bridgelux IIRC but CREE made the "die" for them which is why people say CREE.
     
  4. eldiablosrt8

    eldiablosrt8 Sponsor

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    Either way. If op wants he can come by n I can show everything going on n If anyone wants par info just bring meter
     
  5. rygh

    rygh Supporting Member

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    I did look at the Brideglux a bit for my DIY build.
    They have a nice 4.5W array. But efficiency and color temp were not ideal.
    not sure which die that used. Probably Cree.

    Any idea on which die generation they use?
     
  6. GreshamH

    GreshamH Guest

    I'll bring my PAR meter to the swap if anyone wants to drag a single all white RB 48" strip with them. I can do the readings on a all blue since I have some :)
     
  7. Coral reefer

    Coral reefer President

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    Now that's what I'm talkin about! Somebody bring one!
     
  8. sfsuphysics

    sfsuphysics Supporting Member

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    See that makes really no sense then if it says 25V then. Each LED is going to need on the order of 3V, unless they're wired in some series/parallel combo.

    Also accord to Evil666 from the nano site he says Cree die but manufactured by Edison Optics.
     
  9. GreshamH

    GreshamH Guest

    BANG... thanks for jump starting my memory, it was Edison, not Bridgelux.

    Sense or no sense the digital display is VOLTS and mine came set below 25v, IIRC it was just above 24v
     
  10. rygh

    rygh Supporting Member

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    25 Volts makes sense.
    Assuming 4 parallel strings of 6 LEDs in series, plus a resistor on each string to turn it into a current source.
    Rather cheesy way to do it, but common and cheap.
     
  11. Gomer

    Gomer Honorary Member

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    ~24v ,makes sense. A lot of LED arrays are wired for 12 and 24V driving on the commercial market. I could be wrong, but I don't think RB uses a high efficiency current drive circuit, but might use something like an LM317 with a resistor to act as a current source. The LEDs probably run at around 3.3V meaning 6 LED on a string, 2V for the driver voltage drop and the rest dissipated as heat across the resistor. Check the underside of RB. I think they physically group the LEDs into groups of 6 as well
     
  12. Gonzo

    Gonzo Guest

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    So each strip of these LED's uses 3watts of energy? Or am I missing something?
     
  13. tuberider

    tuberider Guest

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    Each LED is rated for 3w, but are under driven in order to mitigate any active cooling issues to prolong life.
     
  14. Gonzo

    Gonzo Guest

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    So if you ran 5 of these Reef Brite LED strips, you'd be at "
     
  15. eldiablosrt8

    eldiablosrt8 Sponsor

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    no you would be about 150 watts
     
  16. Gonzo

    Gonzo Guest

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    So if I'm running a 4 bulb T5 unit (24watts per bulb) and switch over to 5 LED strips, I'd be increasing my wattage thus increasing my monthly electricity bill. Correct?
     
  17. iCon

    iCon Supporting Member

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    You have a 4x24w T5 fixture over your 90g?????
     
  18. Gonzo

    Gonzo Guest

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    Oops! I thought something was off. I was looking at the wrong model. I'm running 4 x 54 watts. Hah!

    So I'd be decreasing my wattage by roughly 50 watts if I went to the LED strips.
     
  19. iCon

    iCon Supporting Member

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    Dude...that's still not enough. Got a thought for ya...
     
  20. CookieJar

    CookieJar Guest

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    Regarding the 54 w T5s, they may not be run at 54 watts, they could be overdriven by the ballast. It's worth checking using a kilowatt meter. I checked my 4 x 24W T5s w/ Icecap ballast (which I know overdrives), and the total wattage was about 40W per bulb.
     

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