Our random twinkle C7 replacement bulbs will create a shimmering glow in your holiday display this season. These twinkling C7 bulbs are perfect to use in outdoor trees and can be mixed with steady burning bulbs for fun lighting effects. These 7-watt, 130-volt bulbs with candelabra bases will blink on and off for 3,000 hours. Safe for both indoor and outdoor use, so you can decorate both the tree and the house for the holidays! These C7 Twinkle bulbs fit into a candelabra (e-12) base, including our C7 Stringers, our Heavy Duty Candelabra (e12) Stringers, our C7 1000' Bulk Spools, or our Vintage e12 Twisted Wire Strings with Bakelight Sockets . Choose 25-bulb packs of Clear, Red, Blue, Green, Yellow, Purple, or our assorted pack with 5 each of Red, Blue, Green, yellow, and Purple. If the color is not listed in the below menu, it is temporarily out of stock so please contact us for estimated date of availability