My average electric consumption DOUBLED since I got a 90 gallon reef system. That's $100/month increase and I've got 2 years of electric bills to prove it!
I have 2 175w Metal Halides on for 8 hours/day. 2 110w Actinics on for 12hours/day. 300w heater, skimmer, 3 in aquarium pumps, Mag 9 return pump. LED Moon lights, PH monitor, and 2 in hood fans.
My wife saw the electric bill a few months ago and wanted to unplug everything! She already hated the aquarium to begin with, now she's got a legitimate rea$on.
I have to admit, I had no idea reef systems sucked up that much electricity.