Depends on where you live. Most hydro companies now use computers to monitor usage. If you go from 150 a month to 350 per month that would raise a red flag. They then would attach a monitor to the line to see whats happening, a week later they would be knocking on your door saying there is a problem or they call the cops. I work for a hydro company. No we don't look to rat people out but the days of plugging in and using 300$ more a month are coming to an end. You better be running a welding shop when they come by.
Now what you want to do is increase gradually then the computer won't trigger the investigation when it detects a big increase. That's why people steal hydro, but that is coming to and end soon. In fact in some places it is more of a crime to steal hydro than to grow pot.
Go slow 2 lites to start, 3 months add another 2. Just before the winter is the time to ramp up due to cold weather for those of us in northern states. Maybe you went to electric heat due to allergies. Could happen.. Maybe add a big central air, get one that is NFG it's for show and can drive your hydro up 150 to 200 if you run it all the time. Just have a possible explanation and you will be fine.
Peace