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There is no such thing as 'power consumption', so a lamp cannot consume any kilowatts over any period of time.

It is energy that is consumed; power is simply the rate at which energy is consumed. Energy consumption is measured in joules or, by electricity companies, in kilowatt hours (not kilowatts per hour!).

So, a 1000-W lamp will consume 1 kW.h over the period of one hour.

You can think of 'power' being equivalent to speed (kilometres per hour) and 'energy' being equivalent to distance travelled (kilometres). You would never ask, "How far can a car travel in kilometres per hour'.

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9y ago
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12y ago

Since an incandescent bulb is a resistive load, with a power factor of 1.0, a 1000 watt (1 KW) bulb will pull 1000 volt-amps (1 KVA).

KVA is related to KW by power factor (PF) with the equation...

KW = (PF)(KVA)

...where PF is the cosine of the phase angle between voltage and current. Again, for the bulb, PF is 1.0. For a typical motor, which is an inductive load, PF ranges in value, with one typical value being 0.92, corresponding to a phase angle of -23 degrees.

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14y ago

1000 kVa is equal to 1,000,000 watts divided by 50 watts equals 20,000 light bulbs.

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13y ago

1000 Watts is one kilowatt - no matter how long you run it. Watt and kilowatt are units of power, not of energy.

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Q: 1000 watt bulb running 20 hours is how many kilowatts?
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