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Which fixture for 5' long tank

Discussion in 'Lighting' started by makutaku, Nov 12, 2012.

  1. makutaku

    makutaku Junior Poster

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    The tank is 60" x 24" x 20", rimless, about 125 gallon.

    I plan to suspend the fixture at least 12" above the tank and I'd like to have enough PAR to grow anything fast if I wanted to.

    My budget is about $600 and I am undecided between these two models:

    ATI 60 Inch 4x80W SunPower T5HO High-Output Fixture $480 (58.5"L x 9.4"W x 2.1"H)
    ATI 48 Inch 6x54W SunPower T5HO High-Output Fixture $530 (47.0"L x 13.4"W x 2.1"H)

    Which one would you recommend ? I am also open to other suggestions.
     
  2. Gerryd

    Gerryd Plant Guru Team
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    How about the 48" ATI sunpower 8x39w if there is one? Better spread and will easily provide enough PAR. Will be a little less on the ends of course but still plenty to grow any carpet..

    I would most likely go for the wider fixture personally. I think at your suggested height you will be fine with a 48" model....
     
  3. makutaku

    makutaku Junior Poster

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    Thanks Gerryd! They do have 48" with 8 bulbs.

    Actually, If I yield to the temptation of more PAR, I am still undecided with the following two other choices:

    1) ATI 48 Inch 8x54W SunPower T5HO - $625 (47.0" x 17.4" x 2.1")


    2) ATI 60 Inch 6x80W SunPower T5HO - $600 (58.5" x 13.4" x 2.1")


    If I go with option 2, I get even more light and stay within budget. My concern, though, is how much light would leak from left and right. If there would be too much leaking then I would prefer option 1, your suggestion.
     
  4. Gerryd

    Gerryd Plant Guru Team
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    Perhaps this will help...

    I have a 72" x 36" x 20" lxwxh 220 gal tank powered by TWIN 36" 8x39w ATI. For 2-3 months one of them was in the shop and I simply centered the single unit. So, this means that there were 18" at the ends that were uncovered by the fixture.

    Yet, using 90% power I was able to grow anything in these areas, albeit more slowly due to lower PAR.

    Again using two units, I am at 45% max power....
     
  5. shoggoth43

    shoggoth43 Lifetime Charter Member
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    I use one of the Tek 4' models. I'm pretty much using only the two furthest bulbs on it. 4 x 54 is a bit overkill and I need to work on getting my solenoid fixed. That said, I'm not having too much trouble growing stuff. Admittedly if I bothered to keep up on maintenance and everything else I'd be doing a lot better but I don't think any of my issues are for lack of light. With all 4 bulbs on I can grow algae like nobody's business, plus the other plants grow too. ;)

    -
    S
     
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