In the madness that is wedding planning, many important elements may be overlooked. Lighting can make such a difference in the overall appearance and mood of your room, that I would definitely suggest taking the time to experiment. Candles have always been a great, and less expensive, way to add ambience to a special event. Use candles along the aisle for your ceremony, as centerpieces for the reception, or as an accent to showcase your cake or guest book table.
Check with your venue to be sure they actually allow real candles. If not, there are many creative alternatives.