So I have a Mars 2 700 watt led in a 3x3 tent . I have a decent size fan in side to circlate air inside. with a 6 inch hydro farm active air inline fan exhausting out which is a 400 cfm . My electric company rate is 10 ¢ kwh . My setup alone is about 500 watt tops . Ive only started at the end of march . So its been on two days for 16/8 then I figured I switch to 13/11 for no more than 5 days . I get my first electric bill and its 300 $ how can this be. I only run my 400 cfm exhaust inline for 13 hours with the light not tp mentioned I Dont have the control switch to turn down the fan yet but still smh .. Should I only have my exhaust on 15 every hour to exhaust the 30 min / hr heat . Im confused because 1000 watt hps guys are not paying near this much a month on their electric bill. I also just found out I have a smart meter . Any comments would help .