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Thread: Cfl or t-8 lights

  1. #17
    Hello, I must be going... Not a Number's Avatar
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    Grand Hotel... always the same. People come, people go. Nothing ever happens.

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    Just to confuse people more, for the fun of it, keep in mind most Lumen measurement are just measurements of light levels that the human eye is sensitive too. So if you have a good quality Red/Blue LED setup the lumen measurement will be pretty low but the plants may be getting a ton of light provided proper wavelengths are used.

    Basically lumen measurements are great for picking a kitchen light but can be very misleading when it comes to your plants needs. After all the higher the bulb makers can get that number the better sales they get, they are not trying to grow a plant just light a room.

    If you want to you could spend months reading up on nothing but lighting, last year I spent a few weeks and learned so much before expanding my grow area with the new LEDs.

    So many options today its just great! When I was a kid we had warm or grow lights T12, or those giant sodium vapor things you could cook a turkey under.

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    One thing you might want to consider is that the lumen output of a CFL diminishes noticeably over its lifetime, so while they are long-lasting they don't provide the same amount of life over their lifespan.

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    Quote Originally Posted by Tanukimo View Post
    One thing you might want to consider is that the lumen output of a CFL diminishes noticeably over its lifetime, so while they are long-lasting they don't provide the same amount of life over their lifespan.
    From my understanding this is true of all the "new" lighting types not just CFLs. Anytime I replace a T5 bulb my plants go into a bit of a "light" shock for a week or two until they get used to it. Same thing with CFLs, I would assume from my reading LEDs will be the same but I'm no were near replacing those.

  5. #21
    Av8tor1's Avatar
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    The "lumen maintenance" of T5's and T8's is about 90% over their lifetime.
    Some of my research links are dated, but if anything the data will have improved over the years...

    http://bluegrasscarnivores.com/research1a/CFL.pdf
    http://bluegrasscarnivores.com/research1a/T8.pdf
    http://bluegrasscarnivores.com/research1a/T5.pdf

    My bulbs are at least four years old, they were two year old when this pic was taken:


    The N. macrophylla that just won POTM, is grown under 2 yr old T8's

    But, like everything else in this hobby.... ymmv :-)
    Bulb life is highly dependent on ballast design and operational conditions.
    .

  6. #22
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    Wow, that is quite the population of heliamphora
    Come to me flies and crawling bugs. This plant wants to give you great big hugs
    Aren't I pretty, don't I smell good? I'd come to you if I could
    But I can't so you must come to me, I'm sure we will get along splendidly

  7. #23
    sarracenia lover dionae's Avatar
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    OMG!!! Those helis are beautiful!!!

  8. #24
    Lotsa blue bluemax's Avatar
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    Quote Originally Posted by Av8tor1 View Post
    The "lumen maintenance" of T5's and T8's is about 90% over their lifetime.
    Some of my research links are dated, but if anything the data will have improved over the years...

    http://bluegrasscarnivores.com/research1a/CFL.pdf
    http://bluegrasscarnivores.com/research1a/T8.pdf
    http://bluegrasscarnivores.com/research1a/T5.pdf

    My bulbs are at least four years old, they were two year old when this pic was taken:


    The N. macrophylla that just won POTM, is grown under 2 yr old T8's

    But, like everything else in this hobby.... ymmv :-)
    Bulb life is highly dependent on ballast design and operational conditions.
    .
    Those are very useful and interesting pdfs. Thanks!
    - Mark

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