hey arron385,you can piggyback the fan and light on the same timer and not worry about to much amp draw on the timer.that way your fan and light come on and go off simultaneously.your ballast will draw less than 7 amps and your fan less than or around 3 amps.you've still got 5 amps on that breaker for other outlets.also the amp draw is always highest just at ignition of the lamp,then the amp draw goes down.good luck,ThcBuz