I assume you meant how much electricity usage is enough to wave a red flag. Am I correct?
 
If so that depends on the size of your home and what area it is in, as in climate, and also how many people live in the home. It all comes down to the average usage of similar sized dwellings as to if you will stick out like a three legged race horse or not.
 
My home is a good bit more than twice as large as the average sized home in my area. It is all electric, right down to running my own well pump, but it is highly efficient and I live alone and I do not have lights on at night other than the room I am in at the time and I even keep that to a minimum. I could run several 1000-watt lights and still be well below the average electricity usage for homes my size. I burn a single 400-watt light and my average electricity usage is less than homes that are around 1,200 sq. ft. or 1,300 sq. ft., which is less than half the size of my home.
 
So as it is said all things are relative and that applies to electricity usage and red flags. If you are within the range of what similar sized homes use you do not have to fear anything but if you go much above that range you might be waving a red flag into the air for someone to spot.
 
That of course means there is no way anyone can give you a specific amount of electricity usage that is safe for you or for any and all to use. What is totally safe for me to use might be a danger for someone else to use and of course the same applies for each individual situation.