unit:W-PER-M2
"Watt per Square Meter} is a unit of irradiance defined as the power received per area. This is a unit in the category of Energy flux. It is also known as watts per square meter, watt per square metre, watts per square metre, watt/square meter, watt/square metre. This unit is commonly used in the SI unit system. Watt Per Square Meter ($W/m^2$) has a dimension of $MT^{-3"$ where $M$ is mass, and $T$ is time. This unit is the standard SI unit in this category.