depends on what you mean suspicious. if your talking about your electric company, then no. people get away alot more than that, it just looks like your blasting A/C all day.
other than that, your responsable for hiding smell, and light proofing your grow area.
hope this helps..
btw candyflippin and hippyflippin is the best thing since sliced bread, or roller skates. i cannot decide which.