10k or 12k which is more yellow?

Discussion in 'General Discussions and Advice' started by maxisoft, 24 Mar 2011.

  1. maxisoft

    maxisoft

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    Hi Guys. I have been discussing this topic with my friend @rakabos He claims that a 10000k T5 is whiter than a 12000K. I am willing to bet a frag with him that 12000k is whiter....

    Please would the experts in this field cast a vote?
     
    Last edited by a moderator: 26 Nov 2015
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  3. sweetnsour

    sweetnsour

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  4. Dane

    Dane

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    Hmmm, neither of them are particularly more yellow. I would agree that the 10k is whiter, but only because the 12k is more blue. Dunno if that makes sense...
     
    Last edited by a moderator: 26 Nov 2015
  5. dallasg

    dallasg Moderator MASA Contributor

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    The closer to 6500k the more yellow, the closer to 20k the more blue
    Posted via Mobile Device
     
  6. leslie hempel

    leslie hempel Moderator MASA Contributor

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    are we comparing 2 tubes of the same make or different ones?
     
  7. maxisoft

    maxisoft Thread Starter

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    Same make... for this exercise Reeftek 80W T5's
     
  8. dallasg

    dallasg Moderator MASA Contributor

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    Let's say same make, but more specific about the light spectrum
    Posted via Mobile Device
     
  9. Adee

    Adee

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    as Dallas said, the one closer to 6500k would be more yellow, so its the 10K
     
  10. lIghty

    lIghty

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    In a lower Kelvin rating there is a higher red (or in this case yellow) component in the colour. Higher to rating there is higher blue component.
     
  11. IMarine

    IMarine

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    hi

    100% correct
     
  12. Tobes

    Tobes Retired Moderator

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    You gonna lose the bet :p

    Guys gave good answers already. In short, less than 10K is more yellow and more than 10K is more blue ;)

    So bag the frag :tt2:
     
  13. jaquesdp08

    jaquesdp08

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    :1: Im with the rest.. Enjoy the frag Rakabos
     
  14. robertkukla

    robertkukla

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    i agree with the rest:thumbup:
     
    Last edited: 24 Mar 2011
  15. jaybeepee

    jaybeepee

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    Sorry misread the initial post - yeah you're gonna lose the bet bud ;)
     
    Last edited: 24 Mar 2011
  16. maxisoft

    maxisoft Thread Starter

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    The question was not which one is more BLUE. The Question was which one is more WHITE..... Do I take it in your esteemed estimation that more yellow is closer to White therefore brighter? I'm fully prepared to lose a frag, its more to understand the facts...:whistling:
     
  17. rakabos

    rakabos

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    lol, u guys crack me up.

    Well the argument is in place because i need to buy new bulbs. I currently have the 2 x 12k bulbs and 2x 10k bulbs which came with the tank. The 12k is more yellow without question, but i cannot see the branding anymore, so they must be pretty old and may even be different brands....

    The more pertinent question would be if you had the same brand, which would be a whiter bulb, the 10k or 12k

    And then a second question would be what would be the best combination for a softie/lps tank such as mine. I was leaning towards 4x10k bulbs and 2xactinic blue bulbs. I will be buying Reeftek as they dont cost half my salary like the Geismans do, so please leave that argument at the door :p

    Oh and max bet the frag i never did lol, so if he loses then technically i get a frag, but if i lose he gets nothing :lol:
     
    Last edited: 24 Mar 2011
  18. Tobes

    Tobes Retired Moderator

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    OK, yes, using the same make tubes both new, the 10K will be more white than the 12K in my opinion.
     
  19. rakabos

    rakabos

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    Bazinga, max i will take that frag now lol
     
  20. Dane

    Dane

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    CSI | The Color of “White”

    What Is Color Temperature?

    [ame="http://en.wikipedia.org/wiki/Color_temperature"]Color temperature - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:planckianLocus.png" class="image"><img alt="" src="http://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/PlanckianLocus.png/300px-PlanckianLocus.png"@@AMEPARAM@@commons/thumb/b/ba/PlanckianLocus.png/300px-PlanckianLocus.png[/ame]

    http://www.3drender.com/glossary/colortemp.htm

    Enjoy. Classic definitions for white are based around the spectra emitted by the sun at noon, which we all know is around 6500k. Most photographers consider higher than that fairly "blueish" and less than that "yellowish"... Hence me saying neither is "more yellow" and in fact, the 12k would be less white and more blue.

    @rakabos, the 6x T5 setup sounds great. 4x 10k and 2x actinics would look awesome. I'd be tempted to stick 20k in the middle even maybe...
     
  21. maxisoft

    maxisoft Thread Starter

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    Hehe... Like I said, I put this post up to learn more than anything and if it should cost me a frag to a fellow reefer, well then I do it with pleasure... (even if I had nothing to gain) But Martin my friend, I would still go for the 12k, because inevitably as I read all these "expert" responses as time goes by, your globes will get more and more yellow which may be the reason in my opinion that your existing 12k is less clear than the 10k... and it could be older too....my 2c ;)
     
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