Mylar/Reflective Sheets

Discussion in 'Marijuana Growing Techniques' started by Rab-T38, Aug 29, 2005.

  1. Rab-T38

    Rab-T38 Member

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    Mylar, the type made for reflecting light to grow marijuana, what's it's actual purpose so I know what to ask for specifically in home-Depot or Lowes?
     
  2. LAB RAT

    LAB RAT Member

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    Mylar Reflective Sheeting its used for reflecting light & heat go to a grow shop
     
  3. Colours

    Colours Senior Member

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    can you use tin foil as a cheap substitute?
     
  4. Rab-T38

    Rab-T38 Member

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    I'm told you can if you use the dull side of aluminum foil, with flourescents at least, otherwise they'de creat hot-spots, but anothers opinion would probably help better.
     
  5. Dan Vicente

    Dan Vicente Member

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    i heard this kind of thing can create like little lazers almost like a magnify glass on an ant, and burn your weed,
     
  6. Colours

    Colours Senior Member

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    if you put the light and the sheets too close without proper ventilation probably.
     
  7. BillyBong

    BillyBong Member

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    Which is why useing the dull side seems a lot more sensible. Also considering the fact that flouros don't gernerate (as much) heat, even when on 24/7.
     
  8. Dan Vicente

    Dan Vicente Member

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    yeah i actualyl tryed the dull side and its working fine, im doing an experimental thing until the season is right and i can grow outdoors
     
  9. billbeau

    billbeau Member

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    Aluminum Foil has been used since the 60's
    and yeah it works. I've used it and know many others
    who have also with no adverse affects. No "lasers" and
    no burn spots. And thats the shiney side.
    The probablem with foil is if you wrinkle it. It needs to stay as flat and smooth
    as possible or it will be reflecting light in every direction but towards
    your plant. Mylar does not and if you notice it is just as shiney as the
    shiney side of foil. Oh, and foil has also been endorsed for years
    by Ed Rosenthal in his books. If it were in anyway bad for the plants he would
    know and he would say so.
     
  10. grouchy_old_dude

    grouchy_old_dude Member

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    Aluminum foil has poorer reflective qualities than "simple, easily maintained, cheap" flat white paint.

    Foil was used in the 60's, because they didn't have/didn't know any better. And they didn't have HID.
    Wake up...smell the coffee and get into the 21 century.;)
     
  11. billbeau

    billbeau Member

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    Cheap white paint was used then too. And the difference in reflective qualities
    between all three of them are small. Mylar is just the newest thing to come
    along. And every time something does, anything old is dismissed like it didn't work anyway. It all works. It worked then it works now. If it harmed the plants they would not have used it. If it is a surface you can't paint for other reasons then
    use the foil or the mylar. It won't really matter which.
    And who said anything about HID? The type of lighting you use has nothing to do
    with what is reflecting it.
    Stay on the topic, and realize that the 21 Century is what will prevent th 22nd.


    Go back to sleep an
     
  12. grouchy_old_dude

    grouchy_old_dude Member

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    According to "THE" Bible...

    Foylon 94-95
    Reflective Mylar 90-95
    Flat White Paint 85-93
    Semi-Gloss White 75-80
    Flat Yellow 70-80
    Aluminum Foil 70-75

    a 20% difference on a 400 watter is 80 watts, or approximately 1000 lumens. Significant?..I think so.

    AND..billbeau, HID= High Intensity Discharge..what makes you think "high" intensity discharge doesn't affect the reflected intensity? We are talking about "hotspots" produced by using foil, no?
    Surely a hid bulb would be more likely to produce a "hotspot" than flourescents.
    Flourescent lighting is so weak that, even direct lighting(let alone reflected) has very little "usefullness" to plants, at a distance of 6 inches.

    it isn't that it didn't work. It is about efficiency.

    Regardless, foil is the least desirable/effecient choice.
     
  13. meangreen

    meangreen Senior Member

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    it isn't that it didn't work. It is about efficiency.

    Regardless, foil is the least desirable/effecient choice

    Stop listen and learn what one tells ya.
     
  14. billbeau

    billbeau Member

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    And I quote:" A flat white paint (super white or decorator white) is a better reflecting
    than surface than glossy white paint or aluminum foil. Flat white paint has about three percent more reflecting capacity than aluminum foil, and reflects light more uniformly. The difference is slight, so use whatever means is most convenient. Paint the walls that border a flat white paint or cover them with aluminum foil, mylar or white poster board." That is a direct quote from The Marijuana Growers Guide By Ed Rosenthal and
    Mel Frank. When you know someone who knows more about growing than
    Ed Rosenthal you let me know.

    Stop(listening to bullshit) and learn what THE ONE has been telling you for over 30 years.
     
  15. grouchy_old_dude

    grouchy_old_dude Member

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    hee-hee..."You can lead a horse to water"...
     
  16. billbeau

    billbeau Member

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    Yes, but an ass like you can't be directed anywhere
    even for its own good.
     
  17. grouchy_old_dude

    grouchy_old_dude Member

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    eeeasy billbeau...name calling is a sure sign of immaturity.

    and just "where" are you directing me.."for my own good"??

    I'm not useing foil..I'm not gonna use foil...
    "Direct" me to the paint department if you wanna help ;)
     
  18. HighBlueSkies

    HighBlueSkies Member

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    If flat white paint is the best at reflecting light then wouldn't it stand to reason that any flat white surface would be beneficial? I ask because I can't paint the walls of my closet, but instead resurfaced them with white, plastic table-coverings, the stuff you buy at party supply stores. It definately brightens the room and was an inexpensive alternative. I think I paid like 6 bucks for a hundred foot roll of heavy-duty white plastic sheet.
     
  19. LAB RAT

    LAB RAT Member

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    R.C CLARK
    J.CERVANTES
    T.FLOWERS
    Hey dude read MARIJUANA BOTANY by R.C CLARK
    & you'll see how much (ED knows shit)
    P.S Billbeau what (OLD DUDE) dont know about MJ growing
    AIN'T WORTH KNOWING
    Its time you sat an listened & please stop quoteing ED ROSTHENTAL
    the last guy that done it also looked VERY STUPID .
     

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