Most people start a Christmas light order by picking a color and then discover halfway through that the bulbs do not fit the wire, the clips do not fit the gutter, or the run is fifty feet short. This guide walks through each decision in the order that avoids those problems. Every section links to a deeper page, and wherever a price is quoted it is the listed price at Christmas Light Supplier on the date at the top of the page, so the numbers are real rather than placeholders.
The seven decisions, in order
- Bulb size. C9 bulbs are the large, classic roofline bulb with an E17 base. C7 bulbs are smaller with an E12 base. Mini lights are small, fixed-bulb strands used on shrubs, trees and railings. Size sets everything else, so decide it first. Compare C9, C7 and mini lights.
- Color temperature. White LEDs are sold in a range from about 2600K (amber, candle-like) to 8500K and higher (blue-white). Pick one white and buy the whole job in it, because two whites side by side look mismatched. See the whites compared.
- Wire. Roofline lights are usually built from bulk socket wire cut to the exact length of each run, rather than prebuilt strings. The cord jacket type decides which plugs fit. Learn about socket wire and SPT-1 vs SPT-2.
- Spacing. Sockets are set every 12, 15 or 24 inches on the wire. Tighter spacing reads as a solid line of light and costs more in bulbs. Choose a spacing.
- Clips. The clip is chosen by what you are attaching to: shingles, gutters, ridges, tile or metal. One clip per socket is the normal count. Match clips to your roof.
- Timers and power. A photocell timer turns lights on at dusk without anyone touching a switch. LED loads are light, but every run still needs a planned outlet and cord path. Plan timers and power.
- Quantity. Measure, divide by spacing, add a few spares, and round up to whole packs. Work out how many to buy.
What a typical roofline order contains
A roofline display built the way professional installers build it has five parts: socket wire, bulbs, clips, plugs and a way to switch it on. Here is what each part costs at the listed prices, so you can see where the money goes before measuring anything.
| Part | What it does | Listed price |
|---|---|---|
| C9 socket wire, 1,000 ft spool, 15 in spacing | The wire the bulbs screw into, cut to each run length | $240.00 |
| C9 LED bulbs, 25 pack | One bulb per socket | $19.95 |
| C9 O clips, 100 pack | Hold each socket to a shingle or gutter | $24.95 |
| Male plugs, 50 pack | Power end of each cut run | $37.99 |
| Female plugs, 50 pack | Far end of a run, to connect the next run | $37.99 |
| Photocell timer | Turns the display on at dusk | $11.00 |
If you would rather not assemble the parts list yourself, prebuilt kits bundle wire, bulbs, clips, stakes and plugs sized to a spool. The C9 250 ft kit with 12 in spacing is listed at $435.00 and the C9 1,000 ft kit with 15 in spacing at $1,299.00. The shopping list page shows both approaches side by side.
Guides in this series
- C9 vs C7 vs mini lights
Bulb bases, visibility from the street and where each size belongs.
- LED color temperature
Sun warm white, warm white, pure white and cool white in Kelvin.
- Socket wire, SPT-1 and SPT-2
Cord jackets, plug matching and building custom-length runs.
- Bulb spacing
12, 15 or 24 inches, and how spacing changes the bulb count.
- Clips by roof type
O clips, all-in-one clips, shingle tabs, ridge, tile and magnet clips.
- Timers and power
Photocell timers, circuit loads and extension runs.
- How many lights to buy
A measured example from tape measure to cart.
- Shopping list
Every part in one checklist with current listed prices.
LED or incandescent?
For new purchases, LED is the practical default. An incandescent C9 bulb is commonly rated around 7 watts and a C7 around 5 watts, so a long incandescent roofline quickly adds up to more load than a single household circuit should carry. LED C9 bulbs draw a small fraction of that, which means longer runs per outlet, cooler bulbs and fewer burned-out filaments to replace. LED bulbs also come in sealed plastic shells that survive ladder drops and hail far better than glass. The trade-off used to be color: early LEDs were bluish, but current warm white and sun warm white LEDs are available in tightly specified Kelvin ranges, covered on the color temperature page.
Where to buy
Every part in this guide is available from Christmas Light Supplier.
Christmas Light Supplier ships every order free, the same day it is placed, with no order minimum and no added fees. You can order a single 25 pack of bulbs or a full commercial case at the same terms, and browse everything in the Christmas Light Supplier shop.
Whatever store you use, compare on three things: the per-unit price once you divide a pack or case by its count, the total after shipping and fees, and how quickly the order leaves the warehouse. Lights bought in November are only useful if they arrive while there is still time to hang them.