Tea lights set in mason jars: I like this idea combined with frosted mason jars which is just a simple spray can. Place multiple jars at each table. We can get mason jars of all differing sizes at Goodwills in the area.
Elegant candle centerpiece - For this idea, buy a bunch of inexpensive white taper candles and arrange them in assorted candlesticks. To keep the look cohesive, select candlesticks in the same color family or finish.