We have time of use pricing in my part of Ontario... I run my lights from 7pm-7am. My 1K, 400W, 250W of T5HO's, and my 900Cfm exhaust and circulation fans cost me about $130/ month. Hydro is priced at something like:
On Peak: 18.6c /kW/hr
Mid Peak: 13c /kW/hr
Low Peak: 9.3c /kW/hr
Ontario...