Complex sentence: A light colour might also indicate a cask which has been re-used several times, a golden colour could be the result of an ex-Bourbon cask while a sherry cask will give the whisky a copper colour.
Split into simpler sentences: A light colour might also indicate a cask which has been re-used several times. A golden colour could be the result of an ex-Bourbon cask while a sherry cask will give the whisky a copper colour.