None.
Watts is unit of power.
Square meter is unit of area.
Irradiance is the term used to describe how many watts of power fall across one square meter of area. It is often measured in units of watts per square meter (W/m²).
Watts is a unit of power (energy per time). Square meter is a unit of area (length squared). These units are not convertible between each other.
If the appliance tells you how many watts it's supposed to use you can buy a watt-meter to measure how many watts the appliance is using buy plugging in the meter into the wall and then plugging the appliance into the meter. A popular brand is "Kill A Watt", it meter can be bought on E-bay for under $25.
one hundred squar feets
1 hectare = 107639.104 sq. feet
Assuming that "squar" was meant to be square and "acer" was meant to be acre, the answer is 43560 sq feet.
A small one 100 watts, a large one 1000 watts or more.
for a large one it is 4,000 watts and for a smaller one it is 1,000 watts
There are one million (1,000,000) watts in a megawatt.
One kilowatt is 1000 Watts.
One lumen is equivalent to approximately 0.001496 watts.
0.001 or .001 or 1/1,000th or one one thousandth or a thousandth. A megawatt is 1,000,000 watts or one million watts. A kilowatt is 1,000 watts or one thousand watts.