What is the difference between C7 and C9 Christmas Bulbs? – Christmas Light Source
Holiday Lighting Outlet LED C9 Sun Warm White Replacement Light Bulbs, Commercial Grade, 3 Diode (Led's) in Each Bulb. Fits in E17 Sockets. Pack of 25 Bulbs, LED Bulbs - Amazon Canada
Home Accents Holiday Multi-Colour & Clear C9 Replacement Christmas Light Bulb (8-Pack) | The Home Depot Canada
C9 LED Bulbs - Warm White – Lights Depot
Holiday Lighting Outlet LED C9 Multi Replacement Christmas Light Bulbs, Commercial Grade Holiday Bulbs, 5 Diode (LED's) in Each Bulb, Fits in E17 Sockets, Pack of 25 Bulbs, LED Bulbs - Amazon Canada