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Thread: Bulb recomendation for 30" 31w T-5 HO

  1. #1

    Bulb recomendation for 30" 31w T-5 HO

    I need to replace a 30" bulb in a t-5 HO light, I believe they are 31w a piece.. as can anyone recomend a nice brand to buy with a good output, I do not have a light meter and do not have any easy way to get my hands on one, so you gurus out there that have tested them, which one will give me a nice high output over other brands??

    where to buy also if you happen to know

    thanks a ton

    Mike

  2. #2
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    Your 30" T5HO fixture is rather obscure in that there is a very limited selection of bulbs for it. I went on several sites and all I found were 6700K, 10,000K and Colormax 30" T5HO's. A 6700K and 10,000K combination may grow your plants OK. If you have a lot of red colors, you may want a Colormax in your mix. But, I've read that the Colormax bulbs don't grow plants as well as 6700K or 10,000K bulbs.

  3. #3
    thanks Left C for answering this.... I have not found good results either, I would think will all the 20L and 29 gallon tanks out there, it would be more popular.. I am going to just buy whatever they have at That Pet Place when I go down for the ACLC meetin on Saturday... really raised above the tank, its not putting out enough light to keep some of the plants happy... I got no growth out of my Riccia and my unkown foreground plant I found here in PA, and some of the hydrocotyles all seems as tho they are not gettin enough light.... I have over 10 BPS going into it right now, and I could not get any pearling.... the one bulb is pretty old, but I would think it should throw off more light... its a coralife so its nothing like an ATI or one of the other nice brands... I am going to change out bulb and see if it makes the difference, if not I will be building my first LED fixtures and use them...

    ferts and CO2 are at a non limiting level so light is the only thing left I could see being the issue...

  4. #4
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    Quote Originally Posted by Green Thumb Aquatics View Post
    thanks Left C for answering this.... I have not found good results either, I would think will all the 20L and 29 gallon tanks out there, it would be more popular.. I am going to just buy whatever they have at That Pet Place when I go down for the ACLC meeting on Saturday...
    20L, 29g and 37g are popular aquarium sizes. You would think that there would be more 30" bulbs available, but they just aren't. There are plenty of 24", 36" and 48" bulb selections and a little less 18", 60", and 72". Maybe 30" bulbs are not used much at all in industrial settings like the 24", 36" and 48" bulbs are. At least there is a good selection of 30" fixtures to pick from.

    It seems that the Coralife 30" 6700K T5HO's are on sale for $4 off at TPP.
    Coralife High Output T5 Lamp - 6700K - 30 in. - 31W Was: $15.99 Now Only: $11.99: http://www.thatpetplace.com/pet/prod/246636/product.web
    Coralife High Output T5 Lamp - 10,000K - 30 in. - 31W Now Only: $15.99: http://www.thatpetplace.com/pet/prod/246628/product.web
    The 30 in. Colormax isn't listed. It may be out of stock at the moment: [url]http://www.thatpetplace.com/pet/group/7934/product.web[/ur


    Quote Originally Posted by Green Thumb Aquatics View Post
    ... really raised above the tank, its not putting out enough light to keep some of the plants happy...
    You have it raised? Do you have the stock legs for the fixture to lower it?


    Question: You aren't using an Actinic bulb with your fixture are you? (Sometimes, this is a question that I feel odd about asking.)
    Last edited by Left C; 02-14-2012 at 07:52 PM.

  5. #5
    the fixture is hung above the tank as close as it can get, as it has emersed DW, which eventually with have emersed growth on it, growth has been very slow in tank, I am hoping it picks up a bit with new bulbs...

    it has one 6700, and one 10,000k, the 10k is pretty old maybe 1 1/2 years.. and looks alot darker than the 6700k, I hope this will resolve issue

    here are pics so you can see how fixture is hung and why it cannot be lowered



    here is a pic of the reflection of the bulbs so you can see how much dimmer the 10k looks, this may be due to the spectrum but I am changing out bulb for sure...




    the extra light you see in the pic is just and extra I put up on the shelf to get some extra light in the tank for the pics

  6. #6
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    That is going to be one really nice set up!

    Here is an option if that new bulb doesn't help. You can overdrive your lights from T5-HO to T5-VHO by using an IceCap 430 or 660 ballast. IceCap has been sold to CoralView. You can get ballasts from them and many other places including ebay. The 430 ballast is a bit cheaper. ebay 430's: http://www.ebay.com/sch/i.html?_from...All-Categories

    Also, I looked at a lot of 30" T5HO fixtures. They all had 24" bulbs except Coralife's. Maybe you can go with either a different fixture like one with 3 or 4 bulbs or add another fixture like you have now.

    Have you checked your PAR guesstimate using Hoppy's charts?

  7. #7
    yes and according to Hoppy's chart I would have about 100 par, but I think with the poor quality of reflectors and bulbs, I am no where near that, I mean 100 par should be plenty of light to grow riccia, and I had the riccia stones in there for 3 weeks and did not have any even comin through the clear shower loufa thing I wrap them with, put back in my old tank, the instantly grew, I literally had signs of growth by end of day.

    I do have another one of the exact same fixtures, this one the ballast went out so they sent me a new one and I kept the old.. but I would prefer not to have to hang another one over it.. we'll see how the bulbs do for it, then on to the next option.. I would be replacing the ballast on the other light either way, is it possible to just switch to the VHO?, will it wire in?, will I need to use adapters or anything? will my bulbs work?

  8. #8
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    As far as I know, you can run the 430 or 660 ballast. But, be safe and double check. There are tons and tons of info about these ballasts. You can contact CoralView and ask. They are prompt to respond. I had a question about my 660 ballast. Anyway, they told me that I could run my 24" T5HO's with my 660. ShadowMac has used a 660 ballast to overdrive his 24" T5HO's. He may have plenty of information. He quit running his because of algae issues.

    Note that CoralView doesn't offer a new 430 ballast, but they offer support to fix them. You can still see new 430's around. The difference between the 430 and the 660 is that the 660 can run more bulbs. The rest is the same. They have a new version of the 660. You can read about it on CoralView's site.

  9. #9
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    Quote Originally Posted by Green Thumb Aquatics View Post
    ... I am going to just buy whatever they have at That Pet Place when I go down for the ACLC meetin on Saturday...
    Hi Green Thumb Aquatics

    Did you pick up a bulb or bulbs from ThatPetPlace?

    Left C

  10. #10
    I did pick up the bulbs and replaced, they look a ton brighter... but due to some weird stuff happening in tank...(stunted and completely stopped growth) I am starting to think this is not a lighting problem....althought, in the front corner of the tank, it gets a little indirect and about half and hour of direct sunlight, the plants that get hit with this do seem to be doing better than the others....

    the only insight I have been given was possibly its CO2 related, however I do not agree with that, but to be sure I have added some overkill.. I am running a ton to tank, its being mixed in multiple ways, ladder diffuser w DIY, and pressurized through GLA's biggest atomizer, and pressurized through a canister filter..... lol and its only a 20 gal, not exactly the hardest size to get enough CO2 into the water.... no critters can live in it as it fries em when the CO2 is on, and that was before the addition of DIY and the additional canister filter

    althought the bulbs definately needed replaced, IMO, its something in the tank/water possibly something to do with how the flourish was treated to rid it of algae before goin into tank, possibly the worm castings I used has something not cool in them... or the rocks had something on them a little toxic...

    dunno, but something is not right...

    CO2 if it was not sufficient is for sure now, lighting should be good to go, althought still no pearling? and ferts are good to... so its gotta be something.. I really done wanna have to tear down and replace substrate/rocks....

    if you have any idea here is the thread : )

    http://www.barrreport.com/showthread...ight-direction

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