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Thread: Are Mirrors Good for Reflecting Light?

  1. #1
    420 Member SmokeyMacPot's Avatar
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    Are Mirrors Good for Reflecting Light?

    Mirrors waste energy by reflecting only a small fraction of the light that falls on them.

    When light, which, like radio waves, is a form of electromagnetic radiation, strikes a metallic mirror the electrons in the metal move just as they do when a radio signal strikes an antenna. Pushing electrons around takes energy, which dims the reflected image.

    Metallic mirrors reflect infrared light (heat) and if your mirror has imperfections this will cause hot spots, which can burn plants. Please note hot spots also apply to Mylar and Foil and IMO are not applicable to growers using small amounts of fluorescent lighting.

    By using a mirror to reflect your light on a wall, you can test for imperfections, if you see an uneven image, with focused beams (normally located at the edge of the reflected pattern) these are known as hot spots and depending on the wattage of your bulb, may burn your foliage.

    Metallic mirrors should not be used as a reflector for your grow room as minimizing light loss is important.

    Author: MedMan

  2. #2
    420 Member
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    Re: Are Mirrors Good for Reflecting Light?

    that was good info,, as i was thinking of using mirrors, it is easy to think it would bounce back just as much light as your own reflection comes back clear, but obviously not the case. so thanks for that, probably saved me not only burning the plants but could be worst,, the hol;e grow room and nieghbours!!!!!!! cheers

  3. #3
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    Re: Are Mirrors Good for Reflecting Light?

    Most growers here recomend just FLAT WHITE painted surface to reflect aprox. 95% of light

  4. #4
    Welcoming Committee - Member of the Month July 11' Captain Kronic's Avatar
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    Re: Are Mirrors Good for Reflecting Light?

    I have thought about the pros and cons of mirrors, I am glad to have read it here so I can learn by someone else' experience... thanks for the share!

    I just use panda plastic mah self!