In the growth stage, most people will only choose to use half of the power, which is 300 watts, and only light on for 18 hours a day. (300 watts) * (18 hours/day) = 5400 watt-hours per day.
In the flowering stage, most people will choose to use the full of the power, which is 600 watts, and light on for 12 hours a day. (600 watts) * (12 hours/day) =7200 watt-hours per day.
