Lighting effectiveness

Discussion in 'Lighting' started by Bluegillfreak, Mar 6, 2012.

  1. BluegillfreakValued MemberMember

    I have a 25G that is 24"L x 13"W x 19"H and right now it has a 24" 28W dual T5 fixture with one 6700k bulb and one colormax bulb. To me this light seems a little dim and my java fern are not really growing they are not dieing but not growing either. I was wondering if I swapped out the colormax bulb it came with with another 6700k bulb if it would brighten up some or if I need to buy a 2nd light fixture?
  2. iZaO JnrWell Known MemberMember

    Im not familiar with what colourmax is, but 6700K is always best for plant growth, so i would say swap it out.

    With a dual T5 Fixture on a 25g tank, i dont believe that it should seem dim? How long have you had the lights?

    If you have recently planted the tank, last month or so, dont worry about the plants yet. It does sometimes take more time for it to come right.
  3. nuc99705

    nuc99705New MemberMember

    You might want to consider some plant food. I put some Leaf Zone in my aquarium for my plants.

  4. OP

    BluegillfreakValued MemberMember

    Its a 28W fixture.
    The colormax bulb  

  5. iZaO JnrWell Known MemberMember

    The colormax bulb seems to be a color enhancer, likely full spectrum or like 8100K.

    I would say put the 6700K bulb on and wait 3 weeks or so to see how it goes.

    There is no need to spend extra money if it is not validated. If after the 3 weeks there is little improvement, then i would say find a plant fertilizer.

    What plants do you have?
  6. OP

    BluegillfreakValued MemberMember

    Right now I just have a few java fern and some java moss in the mail to me but I want to add in some red crypts and maybe some Ludwigia
  7. iZaO JnrWell Known MemberMember

    Well the javas will grow madly in that light!... How long ago did you add them?

    The crypts will also work, they are heavy root feeders and will thrive with some root tabs or specialised substrate.

    Ludwigia i am not too familiar with, but im sure someone with more experience will answer here soon. If not post your questions in the plant's section forum :):)
  8. AlyeskaGirlFishlore VIPMember

    Ok, you have 2 T5 bulbs at 14w x 2 = 28. You've got a 6700k and a colormax full-spectrum bulb. Full-spectrum is fine. So, 28w over a 25g tank puts you at low lighting. Low lighting = slow growth. Stronger the light the faster plants grow. Then you start getting into fertilizer and co2 with medium/highlighting. It depends what plants you want to grow is what lighting you need. Then you go from there. I'd say you need more light for what you are looking for.

    I've never kept Ludwigia but I believe they need medium to highlight to do best. According to my plant book. :)
    Last edited: Mar 8, 2012
  9. iZaO JnrWell Known MemberMember

    I would disagree. These are T5's, so to me the effectiveness is different than T8s. I think they will work fine, just wont grow fast. I do believe some cryps will work well, since this tank wont be too deep either.
  10. OP

    BluegillfreakValued MemberMember

    I would like to brighten it up a bit anyway I was thinking about getting one of the.led marineland lights and use it and my current fixture would that work ok?
  11. AlyeskaGirlFishlore VIPMember

    If they are T5NO this will put you in the lowlight category for the height of your tank.

    If they are T5HO this will put you in the highlight category.
  12. catsma_97504Fishlore LegendMember

    I agree with Christine. These bulbs are standard output lighting. The OP has low lighting with his current fixture. While T5NO bulbs use less energy, compared to T8 or T12, the do not produce more light. This is why the OP stated his tank is a bit dark and wanted to brighten it up.

    I would suggest the OP look at picking up a dual tube T5HO fixture. This would brighten up the tank. LED lighting is very expensive and produces very little light, 1.5 watts per LED bulb or less.

    Here is a chart that I like to refer to when estimating light:

    Hope this helps.
    Last edited by a moderator: Nov 23, 2018
  13. OP

    BluegillfreakValued MemberMember

    Where is a good place to order a new fixture? My LFS is really expensive and petsmart doesnt have .
  14. iZaO JnrWell Known MemberMember

    good deals can always be found on amazon or craigslist.
  15. catsma_97504Fishlore LegendMember

    eBay is another source.
  16. gourami88

    gourami88Valued MemberMember

    Do you know what type of ludwigia it is? Depending on the type it will require lots of attention, plenty of ferts and co2. All ludwigia that i'm familiar with require bright lighting, and most are hard to care for.
  17. Redshark1

    Redshark1Well Known MemberMember

    If you don't already have them I suggest you use reflectors. Or even aluminium foil, using the shiny side to reflect the light into the water.

    I am pleased with the results in my tanks but there is no substitute for decent lights. Don't be afraid to upgrade if necessary - I did with my 40 gal cube and never looked back.

    The project only cost me £90 which included adding 2 x HOT5s to my 2 x T8s, adding reflectors and making a new aluminium hood to replace the crappy plastic.

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