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Thread: Osram Dulux PL tube

  1. #1
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    Osram Dulux PL tube

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    Got a Osram PL 55W tube. On it, it states 55W/860 4650 Lumen LUMILUX Daylight. Is this suitable for a planted tank? The tank currently have 2x18W 6500K tubes over it.
    ... always look at the bright side of life

  2. #2
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    I believe 860 refers to 6000k color temp. Should be okay for plants.
    ckchua

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    ----------------
    On 10/23/2003 5:29:28 PM

    I believe 860 refers to 6000k color temp. Should be okay for plants.
    ----------------

    Do you happen to have a list of what the numbers corresspond to what colour temp.?
    Corydoras: 2 x adolfoi, 1 x agassizii, 5 x albino aeneus, 3 x arcuatus, 4 x atropersonatus, 3 x axelrodi, 6 x axelrodi variante B, 4 x caudimaculatus, 5 x duplicareus, 8 x goldlines, 3 x kanei, 3 x loretoensis, 6 x melini, 4 x panda, 6 x schwartzi, 3 x similis, 4 x sterbai, 4 x surinamensis, 5 x trilineatus, 4 x tukano & 3 x zygatus

    RIP 1 x adolfoi, 1 x albino aeneus & 2 x panda

  4. #4
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    My friend pointed this out to me on OSRAM PL lights at hardware shop yesterday :

    865 - 6500K (printed on box)
    827 - 2700K (printed on box)

    So, I'm assuming we can just drop the first digit '8' and take the last 2 digits as the color temp.

    Philips label their PL lights as 827, 840 & 865. Hope this assumption is correct. []
    ckchua

  5. #5
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    Chua,
    You're right.

    Joe,
    Recomended lights temp for planted tank is between 5500K~7500K. So 6000K should be OK.
    Cheers!!

    Sherwin Choo
    [email protected]

  6. #6
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    The '8' in 865 or 827 represents the colour rendering index (CRI) of the FL tube. The CRI of '8' is between 80 to 89 [2].

    The CRI of natural sunlight during noon time is 100. When an object is illuminated with a source of light having CRI 100, the object will look like what it is supposed to be in its natural colour [1].

    References:
    [1] S. K. Unnikrishnan, "The Aquarium Plant Handbook", Oriental Aquarium (S) Pte Ltd 2002.

    [2] http://www.osram.com/pdf/service_cor...lumenkarte.pdf

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    Thanks guys! Indeed the 60 refers to 6000k.
    ... always look at the bright side of life

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