C7/C9 Sockets and Seals

C7 and C9 socket hardware covers two needs: building custom stringer wire from raw SPT lamp cord, and protecting your installed display from moisture at socket connection points. The Christmas Light Emporium carries replacement sockets, rubber seals, and socket covers for both C7 (E12) and C9 (E17) formats.

What’s in This Collection

Replacement Sockets — C9 (E17) — For building custom C9 stringer wire from raw SPT1 or SPT2 lamp cord. Green and white. Snap onto the wire to create a socket at any position along the run.

Replacement Sockets — C7 (E12) — For building custom C7 stringer wire from raw SPT1 lamp cord. Green and white.

Socket Seals — Rubber O-Rings — Rubber O-ring seals that fit between the C7 or C9 bulb base and the socket to reduce moisture intrusion at the connection point. Green and white.

Socket Stuffer® Covers — Screw-in covers for empty C7 or C9 sockets on stringers where sockets are left unfilled. Prevents moisture entry and gives the stringer a clean finished appearance.

Blackout Caps — Multi-use covers for empty sockets and exposed connection points.

How to Choose

Building custom stringer wire from SPT cord — use replacement sockets. Protecting existing bulb connections from moisture — use socket seals. Covering unfilled sockets on a stringer — use Socket Stuffer® or blackout caps.

Frequently Asked Questions

What’s the difference between C7 and C9 sockets? C7 sockets have an E12 candelabra opening for C7 bulbs. C9 sockets have an E17 intermediate opening for C9 bulbs. They are not interchangeable.

SPT1 vs. SPT2 sockets — does it matter? Yes — SPT1 sockets are rated for SPT1 wire; SPT2 sockets for SPT2 wire. Match socket to wire gauge.

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

What is a cord seal and when do I need one?

A cord seal (also called a cord dome or weatherproof cover) is a protective cap that covers an outdoor plug-in connection. It keeps rain and moisture out of the connection point. Use a cord seal on any outdoor plug connection that is exposed to weather — especially where extension cords connect to string lights or timers.

C7/C9 Stringers | SPT1 & SPT2 Wire | Moisture Protection | Vampire Plugs