15000k red??

Discussion in 'T5 Aquarium Lighting' started by fays88, Aug 22, 2009.

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  1. fays88

    fays88 Spaghetti Worm

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    hey guys... ive got a t5 bulb that is 15000k although the colour is redish... not bluish white...

    is this bulb good to use for reef tanks?

    and any downside for using redish colour light 15000k?

    cheers guys!
     
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  3. Crimson Ghost

    Crimson Ghost Blue Ringed Angel

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    Light is measured in Kelvin, a standard color temperature chart actually. The color spectrum goes from red do blue. 1,000 Kelvin is red and then the it ranges up to blue. In our tanks we are on average using 6,500 – 20,000 Kelvin, basically a crisp white to a nice deep blue. The red at 15,000K doesn’t seem right to me.

    Edit: I a little tired so I just did a quick google to get you the facts in case I am not being clear (vacation mornings are tough! ) see here, this will help to understand

    http://en.wikipedia.org/wiki/Planckian_locus
     
    Last edited: Aug 22, 2009
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  4. Dr.Fragenstein

    Dr.Fragenstein Panda Puffer

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    Is it a Fiji Puple lamp per chance?
     
  5. fays88

    fays88 Spaghetti Worm

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    nope, it isnt fiji purple...
     
  6. PackLeader

    PackLeader Giant Squid

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    15000K would normally be just fine, but I agree "red" just does not seem right. What brand of bulb is it?
     
  7. fays88

    fays88 Spaghetti Worm

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    well it came with the fixture... soo its brand less... all it says is "15000k HO 54W"
    cheers packleader...
     
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  9. Dr.Fragenstein

    Dr.Fragenstein Panda Puffer

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  10. ReefSparky

    ReefSparky Super Moderator Staff Member

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    15,000K shouldn't have any visible red to it???

    That's in the blues, I thought. What I've always taken as being the case is, 6500K is direct sunlight at sea level, 10K is a few feet down into the ocean, 15K is approaching blue, and 20K would be very blue.
     
    Last edited: Aug 23, 2009
  11. PharmrJohn

    PharmrJohn The Dude

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    That's my take on it as well......

    15000K shouldn't show much red at all. There could be some red in the spectrum output, but noticable? Not likely. How old is the bulb (forgive me if I missed it)?
     
  12. GuitarMan89

    GuitarMan89 Giant Squid

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    That's what I was wondering. Usually older bulbs have some sort of spectrum shift.