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Thread: Lighting Question

  1. #9
    nepenthes_ak's Avatar
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    The lights aren't any thing special I got them at Lowes.

    I am more curious about the lights I posted in the URL, if any one has any information on them for me.

  2. #10
    Doing it wrong until I do it right. xvart's Avatar
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    I use 4 normal florescent bulbs for my cephs and they do fine.

    xvart.
    "The tragedy of life is not that every man loses; but that he almost wins."

    "Quis custodiet ipsos custodes?"

  3. #11
    Av8tor1's Avatar
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    I use mylar coated walmart T12's for all my plants, including my cephs, helis etc etc

    and I am very pleased with their growth rate and colour... more lumens and more expense doesnt always equal a better light, you best do your research into the physics of light and the needs of your plants, not what light has the greatest lumen rating or the coolest looking reflector

    my lights

    Av

  4. #12
    Carnivorous plant enthusiast vraev's Avatar
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    Hey B,

    I was thinking of purchasing a light like this:

    http://www.marinedepot.com/ps_ViewIt...s~vendor~.html

    I mean...I have got 2 fixtures. One of them was really worht it: a 4 foot T8 fixture for all my temperate table plants. The neps, I got them a 2 foot 2 tube T12 fixture (they don't have T8) and personally it SUCKS. I spent 65$ CDN on it and what's the point?? I mean instead I could get htis finished T5 fixture and it would give me more lumens than that crap. I cannot return it as I had to pop some holes in the fixture to pass the wires and I used the lights for a hr or so. I am still using it....but its worthless.

    Its my opinion..that if you CANNOT USE 4 foot fxitures due to space constraints...you might as well spend some money to get good ones rather than try using cheap ones like I did and end up spending MORE + still facing low light issues. LESSON LEARNT for me and after like 80$ of money wastage.

  5. #13
    Don't eat me,... Mr. Flytrap thbjr's Avatar
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    Quote Originally Posted by Av8tor1 View Post
    I use mylar coated walmart T12's for all my plants, including my cephs, helis etc etc

    and I am very pleased with their growth rate and colour... more lumens and more expense doesnt always equal a better light, you best do your research into the physics of light and the needs of your plants, not what light has the greatest lumen rating or the coolest looking reflector

    my lights

    Av
    Av8tor, how do you attach the mylar to the reflector?

  6. #14
    Av8tor1's Avatar
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    Elmer's brand spray craft glue... i start by cutting to approx size, then tape in a couple places on one side to start and spray as i lay it down..

    and with the Elmer's, after a few months, it will release without a whole lot of effort if you want to replace the mylar... works very slick

    my first few applications came out a little wrinkled, but now its a breeze to lay it down slick as can be

    makes a big difference in fixture efficiency... just remember, half the bulb is pointed in the wrong direction

    (and also the "Inverse Square Law for Light" tells us that applying mylar here will result in the single greatest gains in efficiency)




    Varun,

    I use my same bulb combination in a dual 15" T5 fixture for my isolation terrarium... and it works great..

    Where a lot of the problem comes from is this affection for the term Lumen... Lumens is a measurement of light intensity as perceived by the human eye not plants.

    The Human eye is most sensitive to the green and yellow wavelengths of the visible light spectrum, whereas plants use mostly the red and blue wavelenghts... which is why most plants look green to us..

    Since this is the case, Lumens can actually be considered a measurement of light energy that the plant cannot use

    My 4' lights use a bulb that focuses its energy in these red and blue wavelengths, so it looks very dim to me and its lumen rating is only 1,350!

    when the energy is not focused correctly or when a light puts tons of energy into the green and yellow because they know that people expect the light to be bright or they know the customer expects a high lumen rating then its like a shotgun compared to a sniper rifle, each will do the job.. but one can do it a whole lot more efficiently and with less electricity and heat generation

    forget lumens, look for wattage and spectra and/or PAR... a million lumens wont grow a single plant if it is all in the wrong spectrum

    say im crazy if you want, but look at my plants and tell me that my poor weak 1,350 lumen bulbs are starving them for light

    its all basic physics and the law of conservation of energy

    class dismissed, read the next chapter by tomorrow, test on friday... hehehehe


    Av

  7. #15
    nepenthes_ak's Avatar
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    Ok Thanks for all that help...

    The thing is I dont have any where to fit my 30 gallon tank, and hang the Shop lights. I'm not doing it from the celling for obvious reasons. And I'm not going to go build a frame for one 30 gallon tank to support the lights. I'm going off to college, and Ill need something that doesn't take up allot of space. (aka 4 shop lights).

    The reason I made mention of those lights, is because Elgecko uses them and I know that it works for him. And AGAIN, if I have a 29 Gallon fish tank, that is 30in. long, Would the 30in lamp be the right size? Or whats the deal?

  8. #16
    Av8tor1's Avatar
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    sorry for the tangent nep, my fault mate...

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