400w mh/hps coverage?

Discussion in 'Lighting' started by The Fast One, Aug 28, 2010.

  1. With a 400w light is the coverage the same with a MH bulb as it is with a HPS bulb and what is the average sq ft coverage? This question has probably been asked before but I just can't find it, I have searched the different categories on this forum and just can't seem to locate it if it has. Thanks for any help. Oh by the way this is a great site I have learned so much that I thought I already knew. lol
     
  2. yes and 3'x3' or 4'x4' i can't remember
     
  3. #4 BenderBob, Aug 28, 2010
    Last edited by a moderator: Aug 28, 2010
    my understanding is you want 50watts per square foot for peak performance. at 3x3 you would have about 44 watts per foot and at 4x4 you would have about 25 watts per foot.

    but I can tell you from experience that a 400 watt Hps works just fine in a 4x4 box. ;)
     

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