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Thread: Light and CP

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    Moderator Joseph Clemens's Avatar
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    Sure, PAR means Photosynthetically Active Radiation, basically means the part of the spectrum that plants can actually use directly. Other parts of the light and electromagnetic spectrum may be nearly as important too. For example ultraviolet frequencies are important because they inhibit the growth of many microorganisms, some of which may be harmful to CP growth and health.
    Joseph Clemens
    Tucson, Arizona, U S A

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    Tropical Fish Enthusiast jimscott's Avatar
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    I know that the plants don't read the books, as Bugweed says, but i find it amusing that my sundews, Utrics, and VFT's (my Sarrs. haven't yet) all go nuts with the flowering in the spring and summer, but the mexi-pings are the opposite. the only time I had a mexi-ping flower was about 6 months ago - a 'Sethos' that was shipped to me, with the bud being inherited. So that sounds about right. I'll bet the spring through fall conditioning has a lot to say about winter flowering, right?

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    Moderator Joseph Clemens's Avatar
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    jimscott,
    You are probably right about that what the plants experience prior to their blooming sets them up to bloom.

    Windplant,
    Not just duration of light is important, but intensity is also. For example: 10 hours at 100 lux = 1000 lux/hrs, but 10 hours at 1000 lux = 10000 lux/hrs. And then of course the frequencies of the light delivered make a huge difference, plants do not use all light, just a small portion of it, certain frequencies.



    Joseph Clemens
    Tucson, Arizona, U S A

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    This is an interesting topic. I received some mexican pings that were very pale and sickly looking. They immediately colored up once I placed them about 10" underneath grow lights. This week I am moving them even closer to see how they respond. I have access to a PAR meter, and I'm going to take some readings at various distances from my grow lights and then compare them to readings taken outdoors.

    During spring I had the opportunity to to research using a Fluorimeter that allowed me to expose plants to specific PAR light levels. I compared shade adapted plants to sun adapted plants. With both types, I started with low PAR levels and slowly increased the PAR to see how they respond. What was interesting is that the even though the sun adapted plants can handle higher PAR levels, there is a saturation point, and the plant then shifts to a photoprotective mechanism to protect itself from excessive light. The saturation point is much lower than the PAR levels they experience in full sun outdoors. The vivid red colors seen in many carnivorous plants is a way they protect themselves from high light levels (especially UV light). There was a study done on temperate pings that illustrates this.

    I would like to carry out this research with carnivorous plants in order to determine optimum PAR levels, but they are difficult to work with because of their unusual leaves.

    Brian

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    Moderator Joseph Clemens's Avatar
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    Brian,
    Excellent, I look forward to hearing your results.

    My guess is that the photoprotective mechanism is triggered with lower PAR levels under fluorescent lights by their higher UV levels.
    Joseph Clemens
    Tucson, Arizona, U S A

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    Just wondering.. What are the types of light used for growing cps artifically? metal head lights?, PL light? What are the voltage used? 55W? 30W?

    regards
    Jonathan

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