I had flashback reading a research paper, I loved thermodynamics at Uni 😭

"The radiant exitance (previously called radiant emittance), M {\displaystyle M}, has dimensions of energy flux (energy per unit time per unit area), and the SI units of measure are joules per second per square metre (J⋅s−1⋅m−2), or equivalently, watts per square metre (W⋅m−2).[2] The SI unit for absolute temperature, T, is the kelvin (K)"
#thermodynamics

https://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law