mW/m²

milliwatt per square meter

Intensityexact by definition

The milliwatt per square metre is one thousandth of a watt per square metre. Radiofrequency exposure limits, indoor illumination expressed as radiant rather than luminous flux, and weak thermal fluxes all fall in this range. The factor of 1e-3 is exact, being an SI prefix.

1 mW/m² 0.001 W/m²