Paper lanterns are a major bang-for-your-buck wedding decoration.  Use them indoors or out, hanging from trees at an outdoor reception or from stakes in the ground are just lovely.  Use them to delineate a pathway to your reception, receiving line, or other area.  Use them with or without candles or lights inside.  Just the paper lanterns alone are beautiful in themselves.  They can be elegant or modern and are a sophisticated addition to your wedding decor.  Ikea, Pier 1 Imports, and Tai Pan trading are great places to go for these.