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T5 for 200 gallon.

Discussion in 'Lighting' started by vincel892, Jan 5, 2016.

  1. vincel892

    vincel892 Junior Poster

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    Hi,


    I am thinking of switching from MH to T5 lighting for my 200 gallon with dimensions ~ 7' x 2' x 2'. The only reason I am currently on MH is because my dad used these for his saltwater set up (my freshwater tank is very new). I was thinking of getting this home depot T5 fixture https://www.homedepot.ca/en/home/p.4-ft-4l-t5-high-output-high-bay.1000732913.html which fits 4 bulbs. However, I am unsure whether a 4 foot fixture is sufficient for a 7 foot tank. I'm also unsure of how many, and what watt T5 bulbs i would need. I am looking to grow high light plants as I am currently fert dosing and injecting CO2. Any help would be appreciated.
     
    #1 vincel892, Jan 5, 2016
    Last edited by a moderator: Jan 6, 2016
  2. UDGags

    UDGags Lifetime Charter Member
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    You want to have two fixtures so you can cover the entire length of the tank OR if you get one you will need to put lower light plants on the ends of the tank/scape appropriately.


    To get high light directly under the fixture, I would guess that fixture needs to be ~6-12" from the surface of the water. You just need to take into account maintenance, splash hazards, etc.


    You should read this is if you haven't. It explains why not to use Watts and some ballpark PAR numbers for various fixtures
     
  3. vincel892

    vincel892 Junior Poster

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    UDGags Thanks for the reply. I think I will end up using two 4' fixtures as I can get them pretty cheap used. Ive been trying to use the PAR values but just a little confused. Does PAR values change with wattage? for ex, for a 48" T5HO 6500K bulb, does it come in different wattages? And if so, do PAR values increase for higher wattages?
     
  4. UDGags

    UDGags Lifetime Charter Member
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    You can't correlate watts to PAR. This is why using watts is frowned upon. Each fixture is going to be slightly different because of reflectors, wiring, etc when talking about T5. If you move to LED's watts are way different than T5, etc.


    The bulbs won't come in different wattage's for the same length. All 48" long bulbs will have the same 54W rating. The difference in the bulbs will be the spectrum they are made for....6500k is a good starting point for beginners. As you get the basics down you can look for other bulbs specifically for plants.


    For example I use a combination of these bulbs in my setup


    Giesemann PowerChrome Aqua Flora T5 Lamp


    Giesemann PowerChrome Midday T5 Lamps


    ATI Blue Plus + T5 HO Aquarium Lamps


    ATI Purple Plus T5 HO Aquarium Lamps


    GE Starcoat 6,500K/10K T5 High Output HO Aquarium Bulbs


    Red Sun Bulbs


    Edit: If you're trying for red high light plants it would be good to get at least one bulb in the red spectrum for each fixture
     
    #4 UDGags, Jan 6, 2016
    Last edited by a moderator: Jan 6, 2016
    2 people like this.
  5. vincel892

    vincel892 Junior Poster

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    u

    UDGags Oh I understand now. I guess Ill go with two 4' fixtures with eight 6500K bulbs for now. May get some bulbs in the red spectrum later on. Would red spectrum be greater or less than 6500K?


    Also, would 8 bulbs at 6" from surface be enough light or way too much?
     
    #5 vincel892, Jan 6, 2016
    Last edited by a moderator: Jan 6, 2016
  6. UDGags

    UDGags Lifetime Charter Member
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    6500K refers to the color temperature and spectrum is the wavelength


    So if you are looking for a "redder" bulb you want to look for one that has more of a peak around 620-750nm. Most higher end bulb manufactures publishes the spectrum...here are the UVL ones. You can see the red sun one at the bottom has a higher peak in the red spectrum so it is delivering more "red" light to plant. Red light promotes anthocyanin, which is what gives plants their red color. Red light is the first essential step for really popping red plants.


    If you want to kind of get a grasp on light specs, you could play around with BML custom setup. It's for their LED's but you can see what happens to the various values as you add different color lights. Kind of advanced but its a good learning tool.
     
    #6 UDGags, Jan 6, 2016
    Last edited by a moderator: Jan 6, 2016
  7. vincel892

    vincel892 Junior Poster

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    I will have a look at that BML link. I'll get the hang of it eventually. Thanks for all your help. Not sure if you could answer this, but do you think 8 x 48" 6500K would be good for high light or would it be way too much?
     
  8. UDGags

    UDGags Lifetime Charter Member
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    It should be good.


    Just mount them in a way that you can raise and lower them to adjust the amount of light the tank gets
     
  9. islanddave

    islanddave Subscriber

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    Should be good look at ati power modules..very good fixtures I think they are the best
     
  10. vincel892

    vincel892 Junior Poster

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    Decided to go with a 4' and 2' sun blaze t5ho fixture used for hydroponics. Will have 4x 54w and 4x 24W (?) bulbs total. Will cost me ~$400 total. Hope this works out. Thanks everyone for the advice
     
  11. vincel892

    vincel892 Junior Poster

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    Before I completely settle for T5's, Does anyone know if there is any LED set up that would cost me under $500 for medium to high lighting?
     
  12. UDGags

    UDGags Lifetime Charter Member
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    Stick with the T5's
     
  13. vincel892

    vincel892 Junior Poster

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    I'm just worried about the cost to replace the bulbs. If i just stick with regular grow light bulbs for hydroponics, it would be pretty affordable. But purchasing some high end bulbs, Id probably need 8 bulbs. And im guessing it would be ~200 per year?
     
  14. burr740

    burr740 Micros Spiller
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  15. vincel892

    vincel892 Junior Poster

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    If only I was from the states or the canadian dollar didnt suck haha. How often is it recommended to change t5ho bulbs? every 1? 2 years?
     
  16. burr740

    burr740 Micros Spiller
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    I think every year is a bit soon, but it can also depend on the brand. I have a Zoo-med Ultra Sun that is 15 months old and has lost less than 5% of it's original PAR (tested with a Hoppy meter)


    Have seen True-lumen Floras drop about 20% after 1 year. Got a Plantmax 65000K that's dropped about 10% going on 11 months.


    Those are just the brands Ive personally tested.


    But....PAR by itself may not be the whole picture. Whether or not the spectrum has degraded, I cannot say.
     
  17. vincel892

    vincel892 Junior Poster

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    Changing bulbs every 1.5 to 2 years seems doable for me. Leaning towards T5HO more now
     
  18. UDGags

    UDGags Lifetime Charter Member
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    I've had my bulbs running for 2+ years without issues. You run them until they burn out. The spectrum will shift (to the red) some over time but for our purposes it won't really make a huge difference. So plan on $100-$200 every 2-4 years for new bulbs.


    I've had to replace a ballast once over the 3yrs on my two ATI units. It cost I think $50-$75 (with shipping).
     
  19. vincel892

    vincel892 Junior Poster

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    100-200 years for new bulbs doesnt sound too bad. The fixtures i am looking at right now are the sun blaze brand used for horticulture. they come with 6500k tubes so I probably wont be able to assess accurately the PAR data on them. will probably be a trial and error type of thing for quite a while
     
  20. burr740

    burr740 Micros Spiller
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    Fwiw I run a 48", 4-bulb Gro Crew unit over my 75 gal. It's a hydroponic brand similar to Sun Blaze, Environ Gro, etc. Cost about $125 and came with some bulbs.


    It's 6" above the surface, about 24" from the sub. PAR is ~120 at the sub. This can change +/- 10 or so, depending on the current choice of bulbs.


    http://www.t5growlightguide.com/grow-crew-t5-ho-4-feet-4-bulb-review/
     
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