Understanding E12 vs E17 Socket Types
What the Numbers Mean
E12 = 12mm base (smaller, often called "candelabra")
E17 = 17mm base (slightly larger, called "intermediate")
That's it — just the width of the screw base. But this choice affects how bright your display looks, how much space it fills, and how many cords you'll need.
E12 Socket Wire
Think of E12 sockets as the smaller cousins to the classic staples. They're perfect for those who prefer a more humble, discreet design.
Bulbs that fit:
C7 Faceted Lights
G20 Smooth Bulbs
Homeowner Tip: Because bulbs that fit E12 wire are smaller, they'll look more discrete when strung up. They're great for smaller details like windows.
E17 Socket Wire
E17 sockets handle larger bulbs, which means more light and more impact. These are the ones you'll see outlining rooftops in bold holiday displays.
Bulbs that fit:
C9 Faceted Lights
G30 Smooth Bulbs
G50 Filament Bulbs
Homeowner Tip: Bulbs that fit E17 wire are great for rooflines and large trees. 12-inch spacing is best for rooflines, while 36-inch spacing on E17 wire looks great on large trees.
Side-by-Side Comparison
Feature | E12 Socket | E17 Socket |
Base Size | 12mm (candelabra) | 17mm (intermediate) |
Bulb Types | C7, G20 | C9, G30, G50 |
Look | Subtle, smaller scale | Bold, visible |
Best Locations | Details like window sills | Rooflines, patios, big outdoor trees |
Available Wire Lengths and Types
Commercial Grade Socket Wire Features:
Large spools are often used by professional installers or those with large projects (200ft+). Buying a spool gives you the ability to custom-cut your wire to fit any installation perfectly
The inbuilt drainage system in the sockets prevents water pooling and allows for ventilation
SPT-2 wire construction for superior durability in harsh weather conditions
Wire Specifications:
SPT-2 construction: 50% thicker insulation than SPT-1 for better cold weather performance and UV protection
Parallel wiring: If one bulb goes out, the rest stay lit
Commercial grade: Built for professional installations but perfect for DIY projects
Wire Lengths
Our E12 and E17 socket wire is available in 25, 100 and 500ft lengths.
25ft and 100ft lengths of E12 and E17 wire have plugs pre-attached at each end.
500ft spools of E12 and E17 socket wire do not have plugs, and are designed to be cut-to-length.
Spacing options are 6-inch spacing, 12-inch spacing, 15-inch spacing, and 36-inch spacing
Some spacing options are not available on every length of socket wire. Check the product page to see the full availability