Novolink 11 ft. 12-Count Facetted LED Large C9 Bulb RGBw Color-Changing Christmas String Light SLWA21-C9-12 - The Home Depot
C9 7-Color Change Smooth LED Replacement Bulb
C7 LED Color Changing Christmas Light Bulbs (25 Pack) - Birddog Lighting
Christmas Lights - C9 Multicolor Color Change Commercial LED Christmas Lights
C9 Slow Color Changing Faceted Minleon LED Retrofit Bulb - LiteSource.com
Flacchi C9 Christmas String Lights with Remote Control - 66 ft 100 LED Color Changing Fairy Lights with Dimmer, Timer, Memory and Multiple Lighting Modes for Indoor and Outdoor Decoration - Amazon.com
C9 Color Change Multicolor LED Christmas Light Bulbs