Hello
Same problem here. Lights (in that case spot lights) broke after I did a test unchecking inverse squared falloff. To get some light I have to keep it unchecked and use strange values in the falloff exponent.
Has anyone some kind of explanation/solution?
I think I know what happened, I also had the same situation. I realized looking closer the lights were not totally dark, just almost off. The “intensity units” changed when toggling “Inversed Square FallOff” back on from “candelas” to “Unitless”.