Electric useage!

Discussion in 'Growing Marijuana Indoors' started by poke sot, Sep 30, 2009.

  1. right now i have my first grow set up and i have a 120 volt ballast for a 400w HPS light, i was wondering on average how much the electric bill would jump having this running 18 hours a day?

    Thank you GC.
  2. around 15-30 bucks what ur killawatt rate

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