Box of 25 Light Bulbs -C7, Steady Burning - Opaque Blue - 7 Watt - Candelabra Base -Great for Night Lights, Decorative Lights and Christmas Strings Wholesale Box of 25 Candelabra Base, C7 -Opaque Blue Night Light Bulbs. Great for Holiday Displays, chandeliers, wall lights, Christmas Strings, decorative fixtures, night lights and any accent lamp with a candelabra size socket. Threaded base of bulbs is approx. 7/16" in diameter. 7 watt, Clear Steady Burning, Avg Life 1500 hours. Imported.