I was curious, because i'm seriously thinking about buying a 400 watt HPS light, but i'm afraid of the cost per month. I've read it's about 30-40 a month and i think that's completely insane... I calculated, and i'm at 3 cents a Kilowatt so, a 400 watt light should theoretically cost me around 6-7 bucks a month... but i'm not sure if there's other things i need to take into account.
Thanks!
Thanks!