This site is supported by the advertisements on it, please disable your AdBlocker so we can continue to provide you with the quality content you expect.
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Unfortunately for Photobucket users, things have changed in a big way as of June 26th they are rolling out a $399 per year subscription fee for those who want to hotlink images from Photobucket’s servers to display elsewhere.
    This does not mean it only affects this site, It now means that billions of images across the Web now display an error message instead of the image in question. :(
    https://barrreport.com/threads/attention-photobucket-users.14377/
    Dismiss Notice

Lighting (again)

Discussion in 'General Plant Topics' started by travdawg, Feb 14, 2005.

  1. travdawg

    travdawg Guru Class Expert

    Joined:
    Feb 2, 2005
    Messages:
    102
    Likes Received:
    0
    Here is aquestion I have posed on a couple of other forums I read, but so far no response from anyone who has these lights... I appreciate any input!

    I was thinkin about buying these :

    http://aquariumplant.com/cgi-bin/cart/LT214.html

    For the tank I am slowly amassing. I was just wondering if anyone had an opinion on this brand/light type.

    Also, with this fixure, it has 4 sockets, for 4 bulbs right??? So if I only wanted to run 2 or 3 bulbs, that would still work, right? Or is it like other fluorescents, where 1 wont work, if there is not a bulb plugged into the 2nd socket?

    Thanks!
     
  2. chubasco

    chubasco Guru Class Expert

    Joined:
    Jan 24, 2005
    Messages:
    284
    Likes Received:
    0
    Re: Lighting (again)

    Travdawg,
    The hood contains 4 compact fluorescent bulbs, 2 in each row. If you run just
    one row, it should be fine. Running 3 would make it much brighter on one side
    of the tank, probably not what you're after. Ask the vendor how the bulbs are wired-in, parallel or series. Hopefully you can run 2 if you want with no problems.

    HTH,

    Bill Ruyle
     
  3. chubasco

    chubasco Guru Class Expert

    Joined:
    Jan 24, 2005
    Messages:
    284
    Likes Received:
    0
    Re: Lighting (again)

    Travdawg,
    The hood contains 4 compact fluorescent bulbs, 2 in each row. If you run just
    one row, it should be fine. Running 3 would make it much brighter on one side
    of the tank, probably not what you're after. Depending on how the sockets are
    wired to the electronic ballast, you should be able to run 2 or 4 if you want
    --ask the vendor to be sure.

    HTH,

    Bill Ruyle
     
  4. fishface

    fishface Guest

    Re: Lighting (again)

    i have a question regarding k ratings versus plant growth.

    right now i'm running the coralife fixture with 4x65w-6700k on a 55g tank. what diffference other than whiter light (so i understand) would this make regarding plant growth? also what pro's and cons are there changing from 6700k to 10,000k?
     
  5. travdawg

    travdawg Guru Class Expert

    Joined:
    Feb 2, 2005
    Messages:
    102
    Likes Received:
    0
    Re: Lighting (again)

    I was wondering the same thing FF, hope someone who knows reads this! lol
     
  6. chubasco

    chubasco Guru Class Expert

    Joined:
    Jan 24, 2005
    Messages:
    284
    Likes Received:
    0
    Re: Lighting (again)

    I don't profess to be an expert, but here are some reported observations: 5000K-10000K grow plants just fine. Different manufacturers of same kelvin temp will look different due to the coating on the bulbs and what color peaks they've chosen. I've used 5000k bulbs of different manufacturers that have subtle yet noticeable differences in color (all are yellower in cast than 6500-10000k). Scott Hieber of APD fame, favors 10000K as it gives a very crisp, white light, which is what he's after. If you have 2 rows for bulbs a combo of 6700K and 10000k would yield better results than going with just one color temp of bulb, this is what the "experts" say. I have a friend who uses NO fluorescents where he combines Grolite WS 8500K(?) with one at 5500K and looks great to me. On his larger tanks there are 4 bulbs, same combination.

    Bill
     
  7. Ian H

    Ian H Guru Class Expert

    Joined:
    Jan 24, 2005
    Messages:
    265
    Likes Received:
    0
    Re: Lighting (again)

    I've always mixed my tubes colouration for two reasons. To give a bright pleasant effect to my tanks and to edge my bets.

    My new PC lighting consists of 2 double tubes:-
    Freshwater Tropical : White 7100k + Pink 8000k
    Freshwater Plant : Pink 8000k + Blue 12000k

    The k rating looked high to me but my plants have given it the thumbs (or is that leaves?) up. Colouration is also good to me.

    Ian
     
  8. Tom Barr

    Tom Barr Founder
    Staff Member Administrator Social Group Admin

    Joined:
    Jan 23, 2005
    Messages:
    18,443
    Likes Received:
    302
    Re: Lighting (again)

    It's not so much the K ratings, as it is the spectral output over the entire range. Kelvins are meaningless to plants, the color means more to outr preception than anything.

    FYI, cool whites(4100K) grow plants as well as any speciality bulb, a study was done and they used RGR's to measure the differences, Relative growth rates are the standard for comparisons and involves a fair amount of work.

    This showed definitiely on aquatic plants that color temps and special bulbs are not any better than cheap ones.

    I agree as I've used them both. I use a mix generally. Folks tend to like the higher color temps. They don't grow plants better etc and the blue light really does not help ther plants as much as many might want to claim.
    It does not help/harm algae either.

    Both plants and algae are very adaptable with light energy.

    Regards,
    Tom Barr
     
  9. Cornhusker

    Cornhusker Guru Class Expert

    Joined:
    Jan 23, 2005
    Messages:
    192
    Likes Received:
    0
    Re: Lighting (again)

    :) tom, i 'm glad to hear once and for all that this or that color or temp is not that big a deal. TOO much controversary over lights. my compact bulbs were slowly burning out ,so i decided to order all new ones. i fell for it. everone said to get 9325GE,so i did. color is yellowish, not particularly pretty over all like 6700k but thats the way it goes. one grows plants as well as the other really. regards,cornhusker :) :)
     
  10. travis

    travis Lifetime Members
    Lifetime Member

    Joined:
    Aug 30, 2006
    Messages:
    21
    Likes Received:
    0
    Re: Lighting (again)

    Heheh, I spent way too much time trying to figure out what color temps would grow plants best when I should have been thinking more about nutrients. Tom set me straight. Right now I even use a little actinic lighting because I like the way it makes things look and doesn't provide more PAR than I need.
     
Loading...

Share This Page