Interesting; my curiosity was piqued. I've never seen (and it wasn't easy to even find) J/m^2 in any literature. What safety standards in RoW use that SI measurement? Is there a consensus or regulatory standard?Yes. The cal/cm^2. Not a problem with that. But the units are interesting.
But the units are interesting. You and other engineers are using cgs units. The centigram, gram, seconds. which is different.
The British and the rest of the world use SI.