\defaultfontfeatures[MonaspaceXenon-Light]
{
  Extension=.otf,
  UprightFont=MonaspaceXenon-Light,
  ItalicFont=MonaspaceXenon-LightItalic,
  BoldFont=MonaspaceXenon-Medium,
  BoldItalicFont=MonaspaceXenon-MediumItalic
}