lighting when flowering

Discussion in 'Growing Marijuana Indoors' started by mikelamb22, Sep 4, 2008.

  1. do u have to use a high pressure sodium light when flowering. or can u just reduce the light from 18hrs a day to 12hrs a day. Or is there a different type of lamp to use.
  2. #2 chemicalcomfort, Sep 4, 2008
    Last edited by a moderator: Sep 4, 2008
    it's possible to induce flowering in a cannabis just by changing the light cycle. The plant doesn't actually care what kind of light. However if you use the proper spectrum bulb for the respective cycle, you'll get much better results.

  3. Yes, but you will severely reduce your yield.

    Just use a HPS bulb.


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