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C9 SPT-2 1000' 12" & 15" Socket Wire Spool
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$337.00
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Built for installers. Used on real jobs.
This is the gear working contractors run on real rooflines. C9 and C7 LED bulbs, socket wire, clips, plugs, and complete pro light kits at contractor wholesale pricing. Most orders ship same day if placed before 2 PM ET. Free shipping over $349.
The 4-sentence answer
This is a 1000-ft spool of C9 socket wire on SPT-2 jacket (0.045″ thick), with mixed 12″ and 15″ socket spacing options. SPT-2 is the outdoor cold-climate spec — thicker jacket survives freeze-thaw cycles and direct UV exposure better than SPT-1. Cut to length, slide on male + female plugs, twist in C9 LED bulbs. The 12″ spacing is residential roofline volume; 15″ is the spec for commercial / longer-run installs where a wider visual gap reads better at viewing distance.
Verified specifications
Every value below is pulled from the printed spool label and the bulk-wire cluster page. No marketing inflation.
| Wire jacket | SPT-2 (0.045″ thick) |
|---|---|
| Conductor | 18 AWG copper |
| Spool length | 1,000 ft |
| Socket spacing options | 12″ or 15″ |
| Socket base | E17 (C9) |
| Voltage rating | 120V AC line voltage |
| UV rating | Rated for direct outdoor sun + freeze-thaw |
| Temperature rating | Cold-climate (-40°F to 105°F) |
| Certification | UL Listed (insulation rating) |
Who this spool is built for
Multi-property contractor — build to length, cut on-site
One 1,000 ft spool supports 4–8 medium residential properties depending on roofline length and bulb count. Cut to length on-site, slide on an SPT-1 male plug at the supply end, cap the other end with a knockout female plug. Cost-per-foot beats pre-built stringers once you’re past ~3 properties per season — the inventory math wins.
Residential roofline at 15″ spacing (the bestseller)
15″ spacing is the residential roofline default. Pairs with Tuff Bulbs C9 or Minleon V2 C9 + Wedge Tuff Clip on the shingle edge. A 60 ft front facade needs ~48 bulbs at 15″ spacing; a typical home runs 200–400 bulbs total. The 15″ spacing reads clean from the street without crossing into “commercial dense.”
Permanent / multi-year installs where toughness premium pays back
SPT-1 jacket handles residential and sheltered commercial. For exposed cold-climate outdoor (Minnesota, Wisconsin, North Dakota, mountain) where the wire sees direct sub-zero conditions all season, step up to SPT-2 (0.045″ jacket). Both jackets carry the same 18 AWG copper inside — the only mechanical difference is the jacket thickness.
What this spool works with
- Bulbs
- Any C9 (E17 base) LED bulb — Tuff Bulbs C9 (0.72W), Minleon V2 C9 (0.78W), and other E17 LED variants. The sockets are E17 industry-standard; bulb brand and Kelvin choice are independent. Shop Minleon V2 C9
- Clips
- C9 Wedge Tuff Clip (volume install — shingle + gutter dual-mount), C9 Tuff Clip Original (detail work), C9 Tuff Tile Clip (Spanish / concrete tile), C9 Parapet Clip (stone caps). The clip clamps to the wire at the socket; clip type is independent of jacket spec. Shop C9 Wedge Tuff Clip
- Plugs
- SPT-1 male plug for THIS spool's SPT-1 jacket. Don't slide an SPT-2 plug onto SPT-1 wire — the plug seats too loose, the spike doesn't make a clean conductor bite, and you’ll see corrosion or arcing within a season. Shop SPT-1 plugs
- Timers / controllers
- Any 120V outdoor timer rated for LED loads. The wire passes power transparently; timer compatibility is between the bulb and the timer, not the wire.
- Will NOT work with
- C7 bulbs (E12 base — use C7 socket wire instead). SPT-2 plugs (jacket mismatch). Bare-wire applications without sockets (use bulk zip cord for those).
C9 SPT-2 vs C9 SPT-1 socket wire
| Spec | C9 SPT-2 (this spool) | C9 SPT-1 |
|---|---|---|
| Jacket thickness | 0.045″ | 0.030″ |
| Conductor | 18 AWG copper | 18 AWG copper |
| Cold-climate use | Yes (rated) | Indoor / sheltered only |
| UV resistance | High (outdoor rated) | Moderate |
| Cost per foot | Higher | Lower |
| Best for | Outdoor cold-climate roofline + perimeter | Indoor / covered / sheltered runs |
See all C9 socket wire side by side →
How to install
- Measure the run + cut to length. Walk the eave and pace the install length. Cut from the spool with sharp scissors or a wire cutter — SPT-1 jacket cuts clean without stripping. Use the measure-as-you-go workflow: cut one run at a time, plug-test, then cut the next.
- Slide on the male plug + cap the female end. Use the SPT-1 male plug to match the jacket spec (don’t cross-match SPT-2 plugs to SPT-1 wire). The vampire spike on the plug pierces both copper conductors when seated firmly. Cap the line end with an SPT-1 female plug with knockout tab so it’s ready for end-to-end connection if you extend the run.
- Pre-bulb at the shop, install at the property. Twist a C9 LED bulb into every socket before transport. Coil the assembled stringer into a labeled garbage can. On the roof, snap a Wedge Tuff Clip onto each bulb base and snap the clip to the shingle or gutter edge. Mid-roof bulb swaps cost 4x the time of pre-mount swaps — bench-test the line before walking onto the ladder.
Certifications and compliance
- cETLus mark — The wire is tested as part of the cETLus-listed seasonal lighting system (Intertek file 5019711). Equivalent to UL Listed for code-compliant installations in the US + Canada.
- 18 AWG copper conductor — Solid copper, not copper-clad aluminum. Critical for long-run amp capacity and corrosion resistance over multiple seasons.
- Gilbert SPT plug standard — The vampire-plug topology is the contractor industry default. Compatible plug brands include Gilbert, Stayhold, and store-brand equivalents that meet the same SPT spec.
- Outdoor seasonal use — Rated for residential and sheltered commercial install conditions. For exposed cold-climate runs, step to SPT-2.
Warranty
Multi-season reuse warranty on C9 SPT-1 1,000 ft Socket Wire Spools from Christmas Lights HQ. Covers jacket cracking, socket failure, or conductor break under normal install conditions.
Not covered: wire damaged by lawn equipment, animal chew through, cuts from the installer at the wrong measure, runs left exposed to direct UV year-round (use SPT-2 or remove between seasons), exceeding the 7-amp continuous load.
Full warranty terms → | Warranty claim contact →
Questions contractors actually ask
What's the difference between 12″ and 15″ spacing?
12″ spacing puts a C9 bulb every foot — the residential roofline standard. 15″ spacing reads slightly more spread-out from the street — better for commercial / large-property installs. Pick spacing based on viewing distance: closer = use 12″, farther = use 15″.
How many bulbs does this 1000-ft spool hold?
At 12″ spacing: 1,000 bulbs (one per foot). At 15″ spacing: ~800 bulbs (one per 15 inches = 0.8 per foot). The spool count matches the spacing.
Do I need SPT-2 or can I use SPT-1?
SPT-2 (0.045″) is the outdoor cold-climate spec. SPT-2 (0.045″) is the indoor / sheltered spec. If your run is exposed to direct rain, snow, or cold below 32°F, use SPT-2. SPT-1 in those conditions cracks the jacket within 1-2 seasons.
Will SPT-1 plugs fit this SPT-2 wire?
No — never cross-match plugs to the wrong wire jacket. SPT-2 wire requires SPT-2 plugs. Cross-matching damages the contact teeth and causes intermittent connections.
Customer reviews
Build the complete C9 SPT-2 line
Orders placed before 2 PM ET ship the same day. Free shipping on orders over $349. Most orders arrive in 2-5 business days via UPS or FedEx Ground.