I suggest the Launcher (like MO2 does) provide a link to file location directly - because not every setting is available in launcher options because I have to edit Shaders section for TLAD Necro Edit.
Be sure that clamp lighting = false is in your settings under the [Shaders] section, or else lights won't look right. Additionally, these default openmw.cfg values need to be changed for the mod to work properly:
/home/cl3v3r/.var/app/org.openmw.OpenMW/config <------------- Found it!