In the US, it usually costs from 7 to 11 cents to run 1000 watts for one hour. That is referred to as the price per kilowatt-hour, which is abbreviated kwh. Your electric bill should give you this number more precisely.
khronik Reviewed by khronik on . 400W HPS and electricity cost??? i have recently purchased a 400 watt HPS and MH from HTG with a growbright MH bulb and a agromax HPS bulb. I plan on putting it in a closet that is about 3'x5'. I am looking to see if anyone would know about how much that would run my energy bill, also if something like that in an average sized appartment would be flagged by the local authorities??? Also if anyone has any experience in the same situation i could use some temp and ventilation advice.... Rating: 5