2700K vs. 6500K temp for macro

Discussion in 'Lighting, Filtration & Other Equipment' started by Chris_150G, Mar 25, 2010.

  1. Chris_150G

    Chris_150G

    Joined:
    Nov 4, 2009
    Messages:
    478
    Likes Received:
    52
    Location:
    Crestline, CA
    I'm upgrading my macro-algae's light today. I just want a little more power .Going from a 23W to a 26W CFL. My options at Target just now were 2700K or 6500K.

    Which do you all think will work better?
     
    Chris_150G, Mar 25, 2010
    #1
    1. Advertisements

  2. Chris_150G

    Brian_G overly obsessed

    Joined:
    Aug 9, 2009
    Messages:
    787
    Likes Received:
    67
    Location:
    Virginia Beach, VA
    Well 6500 is a lot whiter than 2700. Considering the suns light is whiter than it is yellow. I would go with the 6500k
     
    Brian_G, Mar 25, 2010
    #2
    Chris_150G likes this.
    1. Advertisements

  3. Chris_150G

    ccCapt Reef Hacker Moderator

    Joined:
    Dec 23, 2007
    Messages:
    3,302
    Likes Received:
    815
    Location:
    Northeast PA
    Daylight is 6500k. The 2700k bulb(very yellow color) will make your water look like someone peed in it.
     
    ccCapt, Mar 25, 2010
    #3
    Chris_150G likes this.
  4. Chris_150G

    Chris_150G

    Joined:
    Nov 4, 2009
    Messages:
    478
    Likes Received:
    52
    Location:
    Crestline, CA
    But its in the refugium. So yellow is no problem if it will be more desireable for photosynthesis.
     
    Chris_150G, Mar 25, 2010
    #4
  5. Chris_150G

    KidJ57 Struggling Reef Addict

    Joined:
    May 21, 2009
    Messages:
    1,920
    Likes Received:
    86
    Location:
    Huntington Beach, CA
    Ya, I always thought if you were trying to grow algae you wanted a warmer (i.e. red/yellow) light as opposed to blue/white. Typically when you see people's algae scrubbers, they're using incandescent lights which would be more similar to the 2700k than the 6500k
     
    KidJ57, Mar 25, 2010
    #5
    Chris_150G likes this.
  6. Chris_150G

    project5k

    Joined:
    Mar 18, 2009
    Messages:
    4,466
    Likes Received:
    154
    Location:
    Seguin Tx
    well, i dont know if it helps, but over my fuge, i have a 100WCFL at 5000k, a 100WCFL at 3500k, and a 10W coralife "colormax" self ballasted standard screwin base bulb... and my calurpa is starting to take off...
     
    project5k, Mar 25, 2010
    #6
    Chris_150G likes this.
  7. Chris_150G

    sen5241b

    Joined:
    Feb 14, 2008
    Messages:
    5,029
    Likes Received:
    387
    Location:
    Arlington VA
    I've heard that a spectrum of about 2500K to 3000k is plenty for macro. I have two 20 watt halogens on my cheato and I have to cut it back all the time.
     
    sen5241b, Mar 25, 2010
    #7
    Chris_150G likes this.
  8. Chris_150G

    Cathic Fish Wrangler

    Joined:
    Jul 9, 2009
    Messages:
    1,896
    Likes Received:
    190
    Location:
    Tuscaloosa, Alabama
    I'd go with 6500k as well. It is an extremely soft white light. should keep the Macro happy.
     
    Cathic, Mar 25, 2010
    #8
    Chris_150G likes this.
  9. Chris_150G

    Bifferwine I am a girl

    Joined:
    May 13, 2006
    Messages:
    46,915
    Likes Received:
    5,889
    Location:
    Lynnwood, WA and missing Tucson, AZ
    I use 6500K over my fuge.
     
    Bifferwine, Mar 27, 2010
    #9
    Chris_150G likes this.
  10. Chris_150G

    vonjankmon

    Joined:
    Jan 3, 2010
    Messages:
    152
    Likes Received:
    12
    Location:
    Catonsville, MD USA
    I've had several different types of planted freshwater tanks over the years and 6500k bulbs are generally considered the better grow bulbs for plants. Assuming the same would hold true for macro algae.
     
    vonjankmon, Mar 29, 2010
    #10
    Chris_150G likes this.
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.