for cost of your lights: 1600w x 18h a day equals: 28800 watts... your electric company charge per Kwh so 28.8 Kwh per day multiplied by lets say 30 days. I dont know whats the cost per Kwh there but here its like $0.06 per Kwh. So, 28.8 x 30 equals: 864 Kwh x $0.06 : $51.84 per months to run on average..

Hope this help you a bit.


Happy Growing!