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Thread: What Reflective Materials can I use for my Grow Room?

  1. #46
    New Member Amnesia420's Avatar
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    Re: What Reflective Materials can I use for my Grow Room?

    I have a glass wardrobe i was planning on using to grow in , is that a good idea? It also has mini LED lights from every angle.
    Last edited by Amnesia420; 10-15-2011 at 05:49 PM. Reason: forgot somthing :p
    Is it 4:20 yet?

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    Re: What Reflective Materials can I use for my Grow Room?

    i have used mylar and diamond mylar! 2nd is way better

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    Re: What Reflective Materials can I use for my Grow Room?

    Has anyone ever used aluminum foil tissue. I got it at micheals craft and hobbie store. I remeber reading about it a long time ago and now this is my first actual grow and it is what i am using. if you hold it up it is transparent but when it sits against the wall it is ver refelctive or at least seams so. just wondering if anyone else has any experiance in this department?

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    Re: What Reflective Materials can I use for my Grow Room?

    speaking of reflective materials...I'm gonna be buying my first grow light this week so I've been hunting around for the best prices for probably a cool tube with reflector and got to wondering what the reflectors are made from so I can make my own. I'm a builder so I do have a metal brake to bend the metal any shape I want...I just wondered what the metal was exactly and where I could find some. Looking to put together a 600W cool tube for under $300 with a reflector about 24"X30"...w/digital ballast and all. Had my eye on this reflector/tube which got me to thinking about making at least my own reflector part....if not the whole thing...
    ViaVolt? Air Cooled Deluxe Reflector - Style # VSCC562, grow light reflectors,air cooled grow light reflector,grow light reflector,best grow light reflector,grow light reflector reviews,wing reflector
    Saw 6"x30" pyrex tubes on ebay for $30 w/shipping.
    Thanks..

  5. #50
    420 Member of the Month (Oct 10') TorturedSoul's Avatar
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    Re: What Reflective Materials can I use for my Grow Room?

    Quote Originally Posted by abuilder View Post
    speaking of reflective materials...I'm gonna be buying my first grow light this week so I've been hunting around for the best prices for probably a cool tube with reflector and got to wondering what the reflectors are made from so I can make my own. I'm a builder so I do have a metal brake to bend the metal any shape I want.
    A sheet metal brake would probably be an awesome DiY Grower tool . You can find sheets of ~95% reflective specular aluminum at many retail hydroponics websites. Just be sure you're getting the good stuff as there is also a ~86% reflective version. Most (ventilated) reflectors are double walled. The outside can be aluminum, mild steel, or whatever. You'll want to weld on a couple of 6" (8", etc.) pieces to connect your ventilation.

    Quote Originally Posted by abuilder View Post
    ..I just wondered what the metal was exactly and where I could find some. Looking to put together a 600W cool tube for under $300 with a reflector about 24"X30"...w/digital ballast and all. Had my eye on this reflector/tube which got me to thinking about making at least my own reflector part....if not the whole thing...
    Cool tubes are great for cooling. Not so great for their specs on light transmission when it comes to the reflected light. IOW... You stick the reflective piece over the tube. The light that comes directly from the bulb to your plants passes through one layer of glass - just like with a "regular" vented hood. But the light that bounces off the reflector has to pass through glass twice - unlike a regular vented hood. So you're going to take a hit. Less than 10%, but you're still losing light that you're paying for on the electric bill. While reflected light is of less use than direct light, with a high-intensity light the amount can still be significant.
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    Re: What Reflective Materials can I use for my Grow Room?

    Tortured Soul...thanks much for that answer. Goes real appreciated. Pretty informative...gives me a little something more to think about. I actually found the same reflector since I made that initial post for $25 less so I ordered that one. It'll be fine to start up with. Will be here March 1st. I was thinking that it was a bit larger in size than most (24.5x31)...which most it seems in this price range are more like 19"x whatever...so I thought I'd be getting a hair more coverage/reflector but not really enough to talk about...still though...I also thought I might be able at some point to get in closer with tubes....and at worst...being the room I'm making is a bit narrower than I'd like (5'-7' wide L-shape x 13' long) I figure I can stand the tube up in the center of some plants..at some point....
    I'll tell you though...making my own would be the way to go! Matter of fact with my ballast order I picked the package that had the ballast and extra tube socket w/15' of cord. Was another fifteen bucks....

    I get what you're saying though and appreciate it!
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    Re: What Reflective Materials can I use for my Grow Room?

    Just curious if aluminum sheets would work good in a grow room? They would be about .062in. think and I can cut them to size and then mount it to my wall. Was just wondering if this might be a good option?

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    420 Member of the Month (Oct 10') TorturedSoul's Avatar
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    Re: What Reflective Materials can I use for my Grow Room?

    Quote Originally Posted by anod View Post
    Just curious if aluminum sheets would work good in a grow room? They would be about .062in. think and I can cut them to size and then mount it to my wall. Was just wondering if this might be a good option?
    Better than nothing. Without knowing the material's reflectivity spec, it's hard to be specific. On average, probably less useful than a good coat of bright flat white paint.

    Good prep work, primer, and decent-quality paint has a lot going for it. You can get titanium and brilliant white at a paint store. Flat white has the highest reflectivity (of paint types) and it diffuses the light so that you shouldn't experience "hot spots." If you need to be able to clean the walls, you might go with an eggshell finish, which will be slightly less reflective. Unlike mylar, panda plastic, aluminum sheeting, et cetera, if you move (or just move your grow room), white painted walls/ceilings can be left behind, lol.

    Under perfect conditions, mylar is probably best. But in many real-world conditions, white paint would be better for practical purposes. Mylar is very thin (usually one or two mil) which means it is easy to accidentally cut. Its reflectivity quickly decreases if it is not installed flat.

    I'd place aluminum sheet below both of them and avoid if possible. If not... it's better than nothing.

    Mylar, white paint, or foil
    Reflective paint vs mylar
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    Re: What Reflective Materials can I use for my Grow Room?

    Thanks for the response. I wasn't sure. I have lots of aluminum sheets available at work so I just thought about it.

    I'll probably look into some paint and/or some mylar.

    Just getting started so I may be back with some more questions.

    Thanks again.

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    Re: What Reflective Materials can I use for my Grow Room?

    When using a highly reflective surface such as mylar "aiming" the reflection is important. If you cover a vertical wall with mylar, a light located in the ceiling will hit the wall at an angle and reflect back at that same angle. So, the reflected light may travel from the light, bounce off the mylar, and hit the floor. If your plants are on a table in your grow room they may not receive any of this reflected light.

    Home Depot sells sheets of styrofoam (about and inch thick) with mylar glued to one side. I cut them into smaller sheets and put them close to the plants. You can adjust the angle of the cards to direct the best light.
    Last edited by 420 Girl; 03-21-2012 at 06:42 PM.

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    Re: What Reflective Materials can I use for my Grow Room?

    I am new here and this may be a stupid question, but what about mirrors?

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    420 Member of the Month (Oct 10') TorturedSoul's Avatar
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    Re: What Reflective Materials can I use for my Grow Room?

    Quote Originally Posted by Asmond View Post
    I am new here and this may be a stupid question, but what about mirrors?
    Low reflectivity, uneven reflectiveness, hot spots, no.
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  13. #58
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    Re: What Reflective Materials can I use for my Grow Room?

    I always thought mirrors were okay, I thought aluminum only had hot spots??
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    Re: What Reflective Materials can I use for my Grow Room?

    Quote Originally Posted by exile19 View Post
    I always thought mirrors were okay, I thought aluminum only had hot spots??
    A "good" mirror has maybe 65% reflectivity. Which is really low for the walls of an indoor garden. Any light that hits one that does manage to get reflected back has to travel through a piece of glass - twice. And they do generally have a less than stellar inner-surface, so yeah, you'll most likely have hot spots from one.
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    Re: What Reflective Materials can I use for my Grow Room?

    I used the poly foam sheets on my floor and walls. works pretty good.

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