I believe that you can incorporate all three styles into your centerpiece. If you are not using any type of professional lighting, like pinspottig, then you do want to incorporate candle light to create a romantic atmosphere. I would place the water activated blue lights in a vase with maybe crystal beads or transluscent marble accents. Then add the flowers of your choice. Perhaps you could use the blue starfish as a bread plate and then incorporate the lanterns by adding beautiful blooms around the wiring or the base of the lantern. Use small votives wrapped with colorful ribbon and glued on seashells.