cost of lighting a hydro system

Discussion in 'Growing Marijuana Indoors' started by tusa, Jan 29, 2003.

  1. how much would it cost to light a hydro system with HPS lights a month? Id probably b using a 400w light.
  2. well, 400w X 18hrs X 30days = 216KW

    if your paying 5cents a kwh then the total $/month would be about:


    Grow on! :D


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