Shop bright C9 U-Filament LED Christmas light bulbs for a classic incandescent-style holiday look with modern LED efficiency. Designed with a visible U-shaped LED filament, these commercial-grade C9 bulbs deliver strong, eye-catching illumination and durable polycarbonate construction for rooflines, trees, storefronts and professional holiday displays. Christmas Lights Canada supplies installers, decorators and businesses across Canada with wholesale Christmas lights and professional Christmas light supplies.