C9 LED Christmas Light Bulbs

C9 LED Christmas light bulbs are the standard for rooflines, architectural outlines, and large commercial displays. The Christmas Light Emporium carries ProCore® C9 bulbs in faceted and smooth lens styles across a full color range — including ColorSplash exclusive blends, RGB color-changing, and twinkle variants. All use an E17 intermediate base and fit any standard C9 stringer.

What’s in This Collection

ProCore® C9 Faceted Bulbs — Multi-faceted lens for maximum sparkle and light scatter. Colors: warm white, cool white, red, green, blue, orange, purple, pink, teal, gold, multicolor, and ColorSplash exclusive blends.

ProCore® C9 Smooth Bulbs — Clean rounded lens for even, uniform glow. Same full color range.

ProCore® C9 Twinkle Bulbs — Each bulb blinks on and off independently at its own random interval. Available in faceted and smooth. Colors: warm white, cool white, multicolor.

C9 RGB Color-Changing Bulbs — ProCore® RGB bulbs that can display any color in the spectrum or slowly morph through colors. Faceted finish. E17 base.

C9 SuperSpark® Strobe Bulbs — Full SuperSpark® all-strobe effect in a screw-in C9 bulb. Each bulb fires independently at its own random pace. Available in cool white, warm white, red, green, and blue.

Faceted vs. Smooth

Faceted ProCore® bulbs have a multi-faceted surface that catches and scatters light for a sparkly, multi-directional effect. Smooth ProCore® bulbs have a clean, rounded finish for an even, uniform glow. Both deliver the same ProCore® build quality.

Bulb vs. Set — Which Do I Need?

If you already have a compatible C9 stringer, buy the bulbs. If you need a stringer and bulbs together, see C9 LED Light Sets — bundled and ready to hang.

How to Choose

C9 bulbs are designed for rooflines, gutters, and architectural outlines where a large, bold bulb is visible from a distance. Choose your lens style based on the look you want: faceted lenses add sparkle, smooth lenses offer a classic glow, and specialty finishes create unique effects. Confirm the base type (E17) matches your existing C9 string sockets before ordering, and choose a color that fits your display scheme.

Frequently Asked Questions

What base do C9 bulbs use? C9 bulbs use an E17 intermediate base. Make sure your stringer has E17 sockets before ordering.

Are C9 bulbs dimmable? Steady-on ProCore® bulbs are dimmable. Twinkle, RGB color-changing, and strobe variants may not be dimmable or may display undesirable behavior when used with a dimmer.

Are C9 bulbs rated for outdoor use? Yes — all ProCore® C9 bulbs are rated for both indoor and outdoor use.

What’s the Reindeer Proof™ Warranty? Our in-house warranty covering manufacturing defects and performance failures. Duration varies — see individual product pages.

Browse Related Collections

C7 LED Bulbs | C9 LED Light Sets | C7/C9 Stringers | ProCore® LED Bulbs | C9 Strobe Lights