Away Builder doesn’t save properly RimLightMethod’s parameters.
“Power” field doesn’t affect stored power value.
Instead of this, value from “Strength” field rewrites power value.
To reproduce this bug just add RimLightMethod to any material.
Set strength to 0.35, for example, and leave power unchanged.
Save file and reopen it. Now check power value! It’s equal to strength!
Loading *.awd files in AS causes the same result. Maybe this problem occurs while loading.