Kilowatt

Kilowatt
One thousand watts.
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Kilowatt
Kilowatt stands for 1,000 watts, and is a measurement standard for the amount of power a light bulb uses.

kilowatt
a metric unit of power equal to one thousand watts or 1.34 horsepower.
kilowatt hour
a metric unit of work or heat equivalent to the total energy developed by a power of one kilowatt working one hour; symbol kWh.

Kilowatt (kW)
Electricity equivalent to 1,000 watts; thus a 10kW light = 10,000 watts. Tip: use kW not K, which is also the abbreviation for Kelvin.
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Kilowatt:
Unit of 1000 watts. Used to measure the power of an electrical light source.
Knot (kt): ...

A flash is a device that produces an instantaneous flash of light at a color temperature of about five thousand five hundred kilowatts to help illuminate a scene.

4.) A plasma rifle's output rating refers to the energy of a single pulse-mode shot in kiloWatt-seconds (kWs or kJ). What a soldier calls a "40W" rifle puts out the same energy in one shot as 40kW for one second.

"Power is expressed in Joules (J), or watt seconds (usually abbreviated to W/s) but never in watts." - not true again. Perhaps you mean "flash ENERGY" is expressed in J or WS. Power is always expressed in Watts, KiloWatts, HorsePower etc.
Frank, ...

See also: Light, Color, Stand, Temperature, Light source