Exterior Christmas decorating ideas add interest to the roof lines, walkways, and bushes of any home. Wrap trees with lights and hang Christmas wreaths and garland on front doors to welcome all in good cheer. Whether adding to your Exterior mega display, or planning to outline the roof of a new home, our lighting and decorating ideas will help you illuminate your home with festive style. Check these beautiful 25 Exterior Christmas Lights Decorations Ideas.