Random Twinkling C9 LED Christmas bulbs and lights for adding a shimmering effect to you special event or display. These twinkle LED c9 bulbs are perfect for Large or small outdoor trees, wreaths and garlands. You can also try using a mix of twinkle and non twinkle led c9 bulbs and a real classy and elegant look. Our twinkling c9 LED bulbs are for UL listed for indoor and outdoor use, have a 50,000 hour bulb life, are ultra energy efficient and fit an intermediate e17 base. These  LED C9 bulbs screw into our C9 Stringers (25' & 100'), our E17 Heavy Duty Light Strings (25', 100' & 330'), our commercial grade bulk  1000' C9 spools as well as our vintage Twisted Wire Strings with E17 Bakelight Sockets.