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Thread: Lumens....

  1. #1

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    How manu lumens should lowland neps get?
    I got one flouroscent tube that has 3000 Lumens and one that has 2500 Lumens over my greenhouse...the plants are 7'' under the lights is this enough??
    Need all the experience I can get...

  2. #2

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    ?
    Need all the experience I can get...

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    1300 is pretty much the minimum

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    Tony Paroubek's Avatar
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    You can't put a lumen count on it. Plants react differently to diffuse lumens vs point source lumens vs the color temperature of those lumens etc etc etc.

    I have a shelf I root cuttings under that has a 2 tube fixture. The tops of the plants are a couple inches from the tubes at most. I think if your going to use straight fluorescent tubes you should have at least 4 tubes. Or you could go with one of those 65w+ 6500k spiral compact fluorescent fixtures.

    Tony
    Is that a Nepenthes in your pocket or you just happy to see me?

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    I read that someone just used ordanary shop bulbs.
    Can I use 3 18 watt flouroscent light tubes to a Villosa and a rajah?
    If the plants are lets say 10 cm under...
    I know that they reguire good light...
    Need all the experience I can get...

  6. #6
    Tony Paroubek's Avatar
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    Ordinary fluorescent tubes work fine but because of their low intensity they need to be fairly close. I think your fine with 3 18w, 10cm above a few plants.
    Tony
    Is that a Nepenthes in your pocket or you just happy to see me?

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    Let's positive thinking! seedjar's Avatar
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    There's a good treatment of lights in the greenhouse forum. Lumens are a misleading measurement because what's actually measured is light percieved by the typical human eye. Our eyes pick up a different spectrum of light than that which is used by plants for photosynthesis, so a bulb could have a very high lumen rating and still provide little useful light to plants. If Tony says you're good, I'd believe it. I grew my first Nep on a single 18 watt bulb and supplemental sunlight for a little more than a year. It didn't kill the plant, but it wasn't growing very fast either. When I switched to forty watt bulbs, I got much more satisfying results. Faster growth, better coloration, etc. But I also went from one small bulb to four big bulbs, so that probably played a big role as well.
    Good luck,
    ~Joe
    o//~ Livin' like a bug ain't easy / My old clothes don't seem to fit me /
    I got little tiny bug feet / I don't really know what bugs eat /
    Don't want no one steppin' on me / Now I'm sympathizin' with fleas /
    Livin' like a bug ain't easy / Livin' like a bug ain't easy... o//~

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    Tony the cool box is 30 cm deep and 50 cm long..(30 hight)
    Can I use only 2 18 watt tubes to one N.villosa and one N.rajah
    Need all the experience I can get...

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