C7 & C9 LED Christmas Light Sets
C7 & C9 LED Christmas Light Sets
with Hardwired Bulbs
with Waterproof Connectors
C7 & C9 Commercial LED Light Sets
with Fully Replaceable Bulbs
C7 & C9 Christmas Lights DIY
Acheive lighting greatness by getting exactly the right bulb, strings and hanging accessories you need for your display.
Specialty C7 & C9 Bulbs and Light Sets
Many amazing bulb styles and combinations to spark your Christmas creativity and create inspiring displays.
C7 & C9 LED CHRISTMAS LIGHTS
Choosing C7 vs. C9
C7 and C9 refer to bulb size. The C9 is the larger cone-shaped bulb at 3 inches tall from base-to-tip — 50% taller than the 2-inch C7 so it stands out from a greater distance, which makes it the standard choice for rooflines, driveways and large Christmas trees. C9 bulbs use an E17 intermediate screw base, so they drop straight into matching C9 socket wire. The C7 is a finer scale that shows well where a display is viewed up close, on railings, window and door frames, mantels and small trees, or home exteriors with less to cover like condos and townhomes. C7 bulbs use an E12 candelabra screw base.
The two are not interchangeable: a C7 won't seat in a C9 socket, and vice versa, so match your replacement bulbs to your sockets before you buy. Many displays use both, running C9 along the eaves for street-side impact and C7 on the porch railing and wreaths for closer detail.
Bulb Style: Faceted, Smooth, or Vintage Filament
Beyond style, the biggest look decision is the bulb's lens style. OptiCore® bulbs come in diamond-faceted and traditional smooth opaque finishes, allowing you to match the bulb to the look you are building. The faceted lens refracts light into a cut-crystal sparkle that carries from a distance, which is why it is a favorite on rooflines and outdoor displays. The smooth opaque lens diffuses light into a soft, uniform glow like a traditional ceramic or frosted bulb — the softer, more classic choice for indoor trees or close-up detail. A reflective core spreads light evenly through the polycarbonate lens for rich, saturated color with fewer hot spots, and steady and twinkle versions come in the same finishes, so you can add movement without changing the look of the bulb.
FlexFilament® is the third style, for anyone wanting a vintage look. A curved LED filament glows through the transparent lens like an antique Edison bulb, giving your display old-world character with modern LED efficiency, and because the filament lights along its full curve rather than from a single point you get the even glow of vintage bulbs in a long-lasting LED. Lightweight PolyFlex PET makes for worry-free, shatterproof bulbs, with select products available with a satin glass lens. That softens the filament into an even, candle-like glow, creating an elegant look whether the bulbs are lit or not. Choose FlexFilament for warm, ambient displays where the bulb itself is part of the decor.
Which Light Sets Should You Choose?
Which type of product you buy can be influenced by how much you want to customize your lights. For plug-and-play convenience, premium-grade pre-assembled LED sets arrive ready to hang, with the bulbs permanently attached to the wire. Their one-piece sealed construction locks out moisture at the bulb base, the shatter-resistant acrylic lenses hold up outdoors, and at just 0.096 watts per bulb they're so energy-efficient they're Energy Star certified. → Shop premium-grade C7/C9 LED sets
For maximum control over length, spacing and color, build your own Christmas lights from stringers and bulbs instead. Socket wire comes with bare sockets and you add the bulbs you choose, then swap them later without replacing the whole string. Pre-sized stringers come in lengths from 10 to 119 feet and bulk spools in 500 and 1,000 feet, and you choose your socket spacing from 6 to 24 inches, so you control how full the line of light looks. → Shop C7/C9 stringers & spools · Shop replacement bulbs
Pre-matched C7 and C9 light kits sit between the two. Every set arrives with the correct number of bulbs to match the pre-sized stringer's length and spacing, removing any guesswork, and bulb color, wire color and spacing are designed together, giving you a finished, coordinated look straight out of the box. Setup is tool-free — just screw in the bulbs and the set is ready to install. The bulbs and stringer in every set are the same professional-grade components sold separately, so you get the same quality either way, and the bulbs are interchangeable, so you can change colors or replace a bulb without buying a whole new set. → Shop pre-matched C7/C9 light kits
Kits and sets come on green, white and black wire, so the wire matches the surface it mounts on and blends in during daylight.
Bulb Style: Faceted, Smooth, or Vintage Filament
Beyond size, the biggest look decision is the bulb's lens style. OptiCore® bulbs come in diamond-faceted and traditional smooth opaque finishes, allowing you to match the bulb to the look you are building. The faceted lens refracts light into a cut-crystal sparkle that carries from a distance, which is why it is a favorite on rooflines and outdoor displays. The smooth opaque lens diffuses light into a soft, uniform glow like a traditional ceramic or frosted bulb — the softer, more classic choice for indoor trees or close-up detail. A reflective core spreads light evenly through the polycarbonate lens for rich, saturated color with fewer hot spots, and steady and twinkle versions come in the same finishes, so you can add movement without changing the look of the bulb.
FlexFilament® is the third style, for anyone wanting a vintage look. A curved LED filament glows through the transparent lens like an antique Edison bulb, giving your display old-world character with modern LED efficiency, and because the filament lights along its full curve rather than from a single point you get the even glow of vintage bulbs in a long-lasting LED. Lightweight PolyFlex PET makes for worry-free, shatterproof bulbs, with select products available with a satin glass lens. That softens the filament into an even, candle-like glow, creating an elegant look whether the bulbs are lit or not. Choose FlexFilament for warm, ambient displays where the bulb itself is part of the decor.
Warm White vs. Cool White
White Christmas lights are the most popular color, and they come in two shades. Warm white LED bulbs are tuned to match the classic glow of a traditional Christmas — the closest LED equivalent to the bulbs you probably grew up with, and on OptiCore that warm white is a 3000K shade. The difference from incandescent is subtle, especially from a distance. Cool white is icier and crisper, with a blue-white tone that looks more modern and contrasts well with colors like red and blue. As a rule of thumb, choose warm white for a traditional, cozy display and cool white for a clean, wintry effect.
C7 and C9 Outdoor Christmas Lights: Weather Rated and Safety Certified
C7 and C9 LED Christmas lights are built for the outdoors. Every LED family we carry — OptiCore®, FlexFilament® and premium-grade pre-assembled sets — is rated for outdoor use in wet locations, with weather-resistant construction and outdoor-rated wire insulation that stand up to rain, snow and freezing temperatures.
Our LED sets are certified by recognized testing labs (UL or ETL). That is your assurance that wherever you install them, especially wet-location displays along eaves or at ground level exposed to rain and snowmelt, the set is safe for the job.
Pro Tip:
Pro Tip: Because C7 bulbs swap in and out one at a time, you can dial in exactly how much twinkle you want instead of settling for an all-steady or all-twinkle string. Twinkle bulbs pulse on and off at random, so mixing a few into a steady C7 string adds gentle sparkle — an effect that stands out most up close, on a fence, railing, or Christmas tree. Start with every fifth socket, then add or remove twinkle bulbs until the movement looks right for your space.
Frequently Asked Questions:
Are LED C7 and C9 Christmas lights breakable? Not easily. LED C7 and C9 bulbs use shatterproof lenses — polycarbonate on OptiCore®, PolyFlex PET on FlexFilament® — that tolerate drops, ladder bumps and freezing weather far better than glass incandescent bulbs. Polycarbonate is 200 times stronger than glass. Select FlexFilament products use a satin glass lens, which is not shatterproof.
What are the best C9 LED Christmas lights? OptiCore® C9 LED bulbs are the top choice for durable outdoor use. Polycarbonate is 200 times stronger than glass, an IP67 rating seals every bulb against dust and water, and at 0.8 watts per bulb strings connect over 1,000 feet end-to-end. A surface-mounted LED fills the reflective core for a fuller, more even glow with fewer hot spots.
Are FlexFilament bulbs as bright as other LED Christmas lights? Yes. Because the entire curved filament is lined with LED diodes, FlexFilament® glows like a vintage Edison bulb instead of shining from one point, but loses nothing in brightness compared to other LED bulbs. The result is a bright, diffuse glow from bulbs that become part of the decoration themselves.
What colors do C7 and C9 LED Christmas lights come in? OptiCore comes in ten colors and FlexFilament in eight, covering warm white, cool white, multicolor, red, blue, green, yellow, orange, pink and purple, plus themed combinations like red-and-white or red-and-green. Color availability varies by line, and C7 and C9 share the same color options.
