what does watts per second mean
Best Answer: Watt = Joules per second. 120 Watt means it consumes 120 Joules every second. The most common term is kilowatt-hour (kWh). This is the amount of kilowatts the device requires, multiplied by the amount of hours you leave it on.So your TV consumes 0.12 kWh every hour if you leave it on.20 Watt means it consumes 120 Joules every second. The most common term is kilowatt-hour (kWh). This is the amount of kilowatts the device requires, multiplied by the amount of hours you leave it on. So your TV consumes 0.12 kWh every hour if you leave it on.