\defaultfontfeatures[Pennstander-Light]
{
  Extension           = .otf,
  UprightFont         = Pennstander-Light,
  ItalicFont          = Pennstander-ItalicLight,
  BoldFont            = Pennstander-Medium,
  BoldItalicFont      = Pennstander-ItalicMedium,
  Ligatures           = {Common,TeX}
}