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black light for growing weed

Can Blacklights Be Used For Growing?

  • Dec 5, 2007
  • #1
  • SmokeyMacPot
    New Member

    They can not.
    Blacklights do not produce the correct spectrum of light to grow plants.

    The only lights that currently produce the required color spectrum of light to grow plants are the following;

    Suitable for Growing:

    Flourescent (Tube shaped)

    Compact Fluorescent
    (a flourescent tube with ballast included that screws into regular light fixture)

    Metal Halide (MH) Best for Vegetative growth, but it doesn’t contain all of the spectrum needed later during flowering for truly outstanding buds. the light shines a blueish/white color

    High Pressure Sodium (HPS) Best for Flowering. Ok for Vegetative. shines a yellow/orange color. All can be purchased at your local home/lumber store.

    Not suitable for growing:

    Blacklight type flourescent lights.

    ANY incandescent lamp
    (if it screws into a regular lamp, it won’t produce worthwhile buds). Exception, compact flouro mentioned above)

    Author: Smokey D Dope

    • Feb 15, 2009
  • #2
  • davejon42
    New Member
    • Feb 15, 2009
  • #3
  • SONIC-D
    New Member

    There are types of black lights that will works But defiantly not actual black lights for display you buy at a head shop they don’t work but there are types like I have a “black light” floro bulb for my screen printing biz its not a real black light but a black light that probably could be used for growing it emulates certain sunlight rays as well maybe people are using them and they worked for them.

    In a magazine I once read that adding mercury vapor during the flowering will increase yield and potency ive never tried this and I think it was around 94 when I read it but I did read it and it was a reliable source (high times). It was about the time I did my first grow ever and wanted light so I ended up with all florescent lighting I also used special bulbs called twist bulbs made for growing they kind of look like a black light but lighter you can use those for sure I did a entire grow with them back then and was defiantly a poor woman’s grow the hole thing was under $80 using a lot of florescent lights.

    They can not. Blacklights do not produce the correct spectrum of light to grow plants. The only lights that currently produce the required color… ]]>