ya i know what blockhead is talking about, there was a calculator on OG..

alls ya gotta do is get the price per watt in your area.. usually 8-12 cents per KiloWatt(KW) per hour... so 400w hps would cost you (4x.12=.48/hr)

do i really have to type out the rest...? or do you understand what he was saying now?
UMrocksmysocks Reviewed by UMrocksmysocks on . Growing and Ligt Bill??? Well, I'm thinking about growing with a 400w light...I was wondering what does the light bill usually go for when you have a freggin 400 watt light in your house on for like 18 hours a day lol. Rating: 5