Lecy Bill

Just wanted to know, because my mum has been kind enough to let me grow in the house, and using a 400w Sodium light, i just wanted to know if it would make a dramatic change to the eletric bill. I pay her rent, just wanted to know if it would be wise to say il give her more, instead of waiting for a massive bill nad then her making me get rid of my babies half way through the grow.

All help is much appreciated

Cheers

it shouldnt be more than like 10-15 bucks a month. i doubt shell notice but if she does say you'll give her an extra 15 a month

costs about 4-5 quid a week on 18/6

have a look at this chart

Thanks alot guys nice one.