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will a 400 mh bulb work in a 400 w hps ballast

Discussion in 'Lighting' started by the potman, Apr 4, 2011.

  1. i put the mh bulb in the hps ballast to see if it would work, and it did. i only kept it lit for about 2 min.
    the bulb had to be twice as bright in the hps ballast. with that said is the mh ballast starting to go bad or is the hps ballast to strong. also during the flowering stage would it be better to turn of the mh light and just run the hps or would it be better to run both at thye same time.
  2. no u cant put mh bulb into hps system unless it is made for both

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