Hanging lights on branches. Go natural with a fat branch and hang a combination of ornaments and candles attached with wire. Use twine or strong fishing wire to suspend the branch from above. You might want to try hangers so as not to damage your ceiling.
This would be so simple and elegant for a winter wedding tablescape / centerpieces.Create a simple centerpiece with holly in little vases. Fill with water and then add a tealight. (One of 8 diy candle projects)