My average electric consumption DOUBLED since I got a 90 gallon reef system. That's $100/month increase and I've got 2 years of electric bills to prove it!
I have 2 175w Metal Halides on for 8 hours/day. 2 110w Actinics on for 12hours/day. 300w heater, skimmer, 3 in aquarium pumps, Mag 9 return...