distance from canopy to light

Discussion in 'Growing Marijuana Indoors' started by naturesforce, Jun 16, 2011.

  1. hi, so far ive grown with cfls

    tomorrow i have being delivered a 250wballast+hps+ air cooled reflector

    my question is, how far from the plants roughly will i need to keep it

    i have no experience at all with hps so appreciate your experiences...........

    cant wait for tommorrow:D
     
  2. 8 - 12 inches?
     
  3. If heat isn't a concern, a 250w must be at least 7.5" away from all plant parts at all times.
     

  4. hopefully heat wont be a concern, minimum ducting, air cooled 250w hps, 20 cubic foot growspace, 135cfm 4"ruck fan on 24/7/carbon filter

    im really hopig not to have heat issues at all with that setup.....but we'll see over the next few days!

    fingers are crossed:)
     

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