cost of light calculator

Discussion in 'Growing Marijuana Indoors' started by djdub92, Jan 25, 2010.

  1. does anyone have a link to a site where u input watts and hours of use and cost per kilowatt hour and it outputs the cost
  2. To calculate your cost, multiply
    the bulb wattage X hours of operation and divide
    by 1000. This figure is the number of kilowatt hours
    of electricity consumed. (Example: a 400 watt bulb
    running for 18 hours will use 7.2 kilowatt hours).
    Check your power bill for the cost of each kilowatt
    hour. Then multiply the number of kilowatt hours by
    the cost of a kilowatt hour (K/hr) to arrive at the cost
    per month to run the light in your area.

    Here is a link to a chart. Power cost estimation guide:wave:

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