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24" T5 on 40B

Discussion in 'Lighting' started by slipfinger, Jul 6, 2017.

  1. slipfinger

    slipfinger Article Editor
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    I am embarking on my next project, which centres around 40B's 36" x 18" x 15".

    I'm currently sourcing lights, which will be T5's.

    I'd like to go with a hydroponics light but can only find 24" or 48".

    I'm guessing a double T5 will give me plenty of light considering the height of the 40's?

    Any thoughts or experience on using a double 24" light on this tank? Will it be enough light to grow most everything and will the shorten length cause issues?
     
  2. Dennis Singh

    Dennis Singh SynKing!

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    x4 will be high enough to grow anything
    odysea off ebay sells fixture that will fit perfectly, 39w each
    I use this fixture on my 40 breeder
    if you want to go 24", spread will lack on the sides and corners
     
  3. Greggz

    Greggz Lifetime Members
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    Agreed, the drop off is more than you would expect. And par also drops a bit as you get to the last 1/4 of the bulb on each side.

    When I had 48" lights over a 60" tank, I used to put crypts and other low light plants around the perimeter, as stems would struggle with the low par.
     
  4. slipfinger

    slipfinger Article Editor
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    Not what I wanted to hear, but figured this was the case before I even posted.

    Regarding # of bulbs, would a 36" dual bulb on 15" depth tank do the trick?

    I'm thinking 4 bulbs would give anything in the tank a severe sunburn?

    EDIT: On the other hand I was not considering the 18" width. 4 bulbs would probably be needed give a good spread?
     
    #4 slipfinger, Jul 6, 2017
    Last edited: Jul 6, 2017
  5. Dennis Singh

    Dennis Singh SynKing!

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    What are you trying to grow?

    4 bulbs you can always raise lighting extra costs
    dual bulb will grow a decent amount of things
     
  6. slipfinger

    slipfinger Article Editor
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    This will be a grow out, experimental tank, so there could be anything and everything in the tank at any given time.

    I do not want light to be a limiting factor, but I also don't want to break the bank..... I know, I want the best of both worlds.

    Ideally I want a 4 bulb with multiple banks, outside together and inside together, not sure if this is even an option. But finding a quad T5 at a descent price or a used one in descent condition is turning out to be a challenge, around my parts anyways.
     
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