how much will this cost?

So i have a setup of a 400w HID light and i want to run it just for flowering so 12 hours a day, but i heard this can run your electricity bill up and thats how people get turned in. So will this do such a thing or should it only raise it like 20-30-40 a month more?

Thanks-

should only raise it 15-20 30 max but it dependson your area its really not using as much energy as you think. space heaters, sound systems and lots of daily use electronics use more than that you are good to go specially with 12/12

Don't sweat it, the computer you are on right now is most likely pulling more juice than that light does. Only way you should worry is if you got 2 1000 watters going with carbon filters, fans, ozone generators and all that happy horse shit going

lol alright well i only got like a few other cfl's for veging so i should be good then thanks guys appreciate the help