Quantity
Wattage
Daily usage in hours
Explanation:
Quantity- the number of lamps or TV's or others that your system has.
Wattage- the power for one quantity only.
Daily usage- the total hours that element consumes.
Ex: House has 5 lamps, each lamp consumes 20Watts, and operates for 10 hours a day. Quantity=5: Wattage=20: Daily Usage in Hours=10