Approximately how much will a 400w HPS cost per month to run? Are we talking $15 a month? $30?
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Approximately how much will a 400w HPS cost per month to run? Are we talking $15 a month? $30?
Something seems like... ah hah! the Search feature!
http://boards.cannabis.com/indoor-li...city-cost.html
For your information I did search but used the incorrect keywords.
Quote:
Originally Posted by gainesvillegreen
Just as easy to do the math... how much per KWH on the power bill then figure 400 watts times the number of hours in the light cycle
Extrapolated into a formula for use:Quote:
Originally Posted by Mississippi Steve
X = price per KWH, in dollars (kilowatt-hour - get this from your power bill)
Y = price per 30 days, in dollars (approximate month)
Z = number of hours a day it will run (12 or 24)
Y = Z * X * 30 * 0.4
So for my friend, who pays $0.10 per KWH, and runs it 12 hours a day, the equation is:
Y = 12 * 0.10 * 30 * .4
Y = $14.40 a month (or 30 days)
dont forget to include all the fans and extra stuff you have plugged inQuote:
Originally Posted by Backpacker420