Dear Paula,

I assume, you are referring to J/s and W/m²?? K is just a thousand of those?

In spite this is an SI unit conversion and hardly related to RayMan, I googled "unit conversion J to w/m²" for you and the first hit was:
https://www.translatorscafe.com/unit-con...%2Fmeter%C2%B2/.

1 watt/meter² [W/m²] = 1 joule/second/meter² [J/(s·m²)]

Best,
Dominik