I have 2x42w(150W output each) floros on 18 hours a day for veg. With 7.984 cents/kwh that would be (.084kilowatts x 7.984cents x 18hours x 55day veg x .01dollars = $6.64) this is how much I'd pay for my ENTIRE veg period.

A 1000W bulb would be (1kilowatt x 7.984cents x 12hours x 55day flower x .01dollars = $52.69) This is how much you'd pay for the ENTIRE flowering period.

Goodluck.