Paper lanterns as light-up centerpieces--inexpensive idea. Slip a Vase in the middle of each lantern and add flowers of choice. OR just adhere silk flowers to top edge of lantern.Put BATTERY OPERATED CANDLES/lighting inside and around each lantern.
DIY angel place settings made from paper plates.I'd use a more elaborate plate or scrapbook paper template. (Not sure about the angel angle, but without the wings it would make the perfect little lady to hold a place card.