LED Help

Discussion in 'Lighting' started by Wolve, 1 Nov 2012.

  1. Wolve

    Wolve

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    Hi Guys planning a new tank currently, and want to go the LED route. i need to know how many leds i would require for the tank.

    tank size 800x600x550 high water at say 500.
    looking at DIY as the units are crazy expensive and i have a tight budget.
    i am currently looking at the following;

    18 white
    24 blue/ royal blue
    8 UV / actinic

    all 3 watt bridgelux, with 60 degree optics, want to use 3 x meanwell ELN-60-48P drivers

    my question is will this be enough to say grow SPS. is the colour arrangement ok, do i need more drivers.
     
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  3. Toolboysa

    Toolboysa Moderator

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    What colours and how many are you planning to put on each driver?

    What is the forward voltage of each LED colour?
     
  4. Wolve

    Wolve Thread Starter

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    im planning the following;

    18 white on one driver - 9 each in parallel
    18 blue same as above
    third driver will have the other 14 leds 8 actinic and 6 blue.

    white 10,000k - 3.7v @ 700mA
    blue - 3.6v @ 700mA
    Actinic - 3.8v @ 700mA

    will it work like this or do i need to change the arrangement, not an electrical master here :).

    oh and i want to use the typhoon controller i think it is to control the leds.
     
  5. butcherman

    butcherman Moderator MASA Contributor

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    This sounds very similar to the build i helped @dallasg with.

    i would go unlense (bridgelux are std 120 degrees unlensed)

    Also do not forget to turn down the drivers to 700ma

    What controller do you plan on using? As the ELN-60-48P drivers use a pwm signal to controll the dimming
     
    Last edited by a moderator: 26 Nov 2015
  6. butcherman

    butcherman Moderator MASA Contributor

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    and yes you would be able to keep sps under these lights.
     
  7. B00tCamp

    B00tCamp

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    @butcherman ,

    Hey man, pls correct me if im wrong...do you still turn the drivers down to 700mA when running parralell strings? does that not halve the current?
     
    Last edited by a moderator: 26 Nov 2015
  8. butcherman

    butcherman Moderator MASA Contributor

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    No, when running 2series in parallel you will run at 1400ma.

    The current will divide between the 2 strings equally assuming that both strings are identical in configuration.
    NB! You will also need to add 2 quick blow fuses, because if one of your paralell series malfuntions you will be pumping 1400ma into a single series and blow even more led's.
     
  9. Wolve

    Wolve Thread Starter

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    hi yes beat me to it, if you run two parallel string the current will be halved, with loss probably only 600mA actually.

    so if i turn the driver down to 700ma then i will only get 350ma through each string, if i add the fuses will 1000ma be fine

    im using this as an example for my wiring:
    [​IMG]
    "This our preferred wiring for the dimmable Mean Well ELN 60-48 series of drivers. At 1.2 Amps this driver will overdrive your CREE X P/R-E LEDs when at full power in a single series. The solution is to run 2 parallel strings and essentially splitting the Amps. This will run two parallel strings of 12 at 600mA which is close to ideal for the CREE X P/R-E LED."
     
    Last edited: 1 Nov 2012
  10. B00tCamp

    B00tCamp

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    lol Thanx guys, got a bit confused now...planning to redo/mod my DIY LED unit on the weekend and started doubting myself there...Hehe
     
  11. Toolboysa

    Toolboysa Moderator

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    k see @butcherman beat me to it. I agree with his posts aswell

    See if you can find the ELN-30-xxx series these are very cool cause there min voltage is 3v. Which means even if a 1 LED blows you dont blow the entire string of LEDs on that driver. Alt put a quick burn fuse on the strings.

    Im a fan of full spectrum and I know not everyone will agree with me but Id add some red and cyan and I prefer my whites to be the neutral whites due to the added spectrum they give compared to the cool white

    Check stevesled aswell very well priced leds. If I remember correctly @CW is building a unit with them.
     
    Last edited by a moderator: 26 Nov 2015
  12. B00tCamp

    B00tCamp

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    @Wolve ,

    Sounds like a nice mix of colour there...should give a nice blue shimmer :)

    I like your idea of splitting the different colours accross the drives like that to gain max control over the colour config :)
    @butcherman , Have you had any negative results with SPS under the LEDs? got mine turned down all the way and still looks like my Strawberry Prostrata is getting burned at the tips.
     
    Last edited by a moderator: 26 Nov 2015
  13. Toolboysa

    Toolboysa Moderator

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    The only negative @butcherman has with his coral and LEDs is awesome growth
     
    Last edited by a moderator: 26 Nov 2015
  14. butcherman

    butcherman Moderator MASA Contributor

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    Sorry i missed this :blush:
    The typhoon controller is great.
    You can run the driver at max but please include fuses into the build to minimise the risk if something should go wrong.
     
  15. butcherman

    butcherman Moderator MASA Contributor

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    Do you have more info about your build? or a tank thread with details?
     
  16. B00tCamp

    B00tCamp

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    Running two Meanwell ELN60-48d drivers with a single string of 14 LED's on each consisting of 10000K white, 6500K white(Cree XPE) , Royal Blue, 1x Green, 1x Red, and 1x UV...Sorry, cant remember the blue white ratio at the moment...all are bridgelux chips except for the 6500K's.

    If im not mistaken there are 5x 10000K, 3x 6500K, 1x Red, 1x Green, 1x UV and 3 Royal Blue on each of the two strings. Drivers are both turned down to 700mA

    Have not loaded the build on my tank thread just yet...still got some work to do on it... :lol:

    Hahahaha!! Nice :)
     
  17. butcherman

    butcherman Moderator MASA Contributor

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    what is the size of your tank?
     
  18. CW

    CW

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    Hi there buddy

    If i were you i wont go for the bridglux leds.
    Ill go for the steaves leds. Alot more powerfull that bridglux.

    I saw 80 bridglux blue and white in action and my 40 steaves leds rock man.

    Go have a look at my thread.
    Something new - Marine Aquariums South Africa

    Good luck
     
  19. B00tCamp

    B00tCamp

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    Have a converted Juwel Lido 120...60x45x55cm
     
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