Watts = Amps x Volts, so
600 W / 240 V = 2.5 A
600 W / 120 V = 5 A
600 W rated balast is more like 660 W in realty, so to be safe, plan for 3A pulled per ballast.
P.S. New digital balasts are much closer to 600 W, something in 610 - 620 W range.
At 120 volts it will pull 4.166 amps. At 240 volts it will pull 2.08 amps.
Aprox 12 amps.
A 120 volt table lamp with a 75 watt bulb will pull 0.625 amps. With a 100 watt bulb it will pull 0.833 amps. And with a modern fluorescent 13 watt bulb it will pull 0.108 amps.
at 230v it will use 5 to 6 amps
About 2.25 Amps.
50 amps.
10.92 Amp
This typically has to do with how many amps you can safely pull from the secondary of the transformer.
5
The horsepower of the motor is needed to complete this answer.
The average 17" LCD monitor will pull around 25 to 30 watts. At 120 volts this would equate to 0.2 to 0.25 amps.
Seven amps pulls zero kilowatts . W = A x V. You need to state a voltage to multiply the amperage by to get watts. Then divide by 1000 to get kilowatts.