Monthly cost of HPS

[Backpacker420]

Approximately how much will a 400w HPS cost per month to run? Are we talking $15 a month? $30?

[gainesvillegreen]

Something seems like... ah hah! the Search feature!

http://boards.cannabis.com/indoor-lighting/126645-400w-hps-electricity-cost.html

[Backpacker420]

For your information I did search but used the incorrect keywords.

[Mississippi Steve]

Something seems like... ah hah! the Search feature!

http://boards.cannabis.com/indoor-lighting/126645-400w-hps-electricity-cost.html


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

[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:

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)

[texas grass]

Approximately how much will a 400w HPS cost per month to run? Are we talking $15 a month? $30?

dont forget to include all the fans and extra stuff you have plugged in