The best C7 Christmas lights, for a roofline that reads from the street
C7 is the classic roofline bulb — bigger than a mini light, smaller than a C9. Spacing, watts per bulb and how far you can run them decide which string.
By Sawyer V. · Published
The C7 is the bulb most people picture on a roofline: about the size of a fingertip, on green wire, one every foot. It is smaller than the C9 on our C9 page, which suits a single-story eave, a porch rail or a window frame, where a C9 can look oversized.
The good listings publish exactly what you need to plan a roofline: spacing, watts per bulb and how many strings run end to end. We ranked on that. Five below, one to skip.
Wreath & Watt earns a commission on qualifying purchases made through the Amazon links on this page. It costs you nothing and it does not change the order of the picks — here is exactly how we are funded.
Quick picks
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 |  Wintergreen Lighting C7 OptiCore LED, 25 bulbs, 25 ft, cool white, green wire25 C7 OptiCore bulbs, 12 in spacing, 0.8 W each, IP67, 480 W run limit | A commercial-grade C7 roofline | 9.8/ 10 | $39.99Amazon #ad · Price as of October 26, 2026 · Disclosure |
| 2 |  C7 LED Christmas lights, 26 ft, 50 strawberry bulbs, warm white50 strawberry C7 bulbs over 26 ft — 6.2 in spacing | The densest faceted bulb | 6.3/ 10 | $26.99Amazon #ad · Price as of October 26, 2026 · Disclosure |
| 3 |  Wintergreen Lighting C7 OptiCore LED, 25 bulbs, 25 ft, commercial, warm white25 C7 OptiCore LEDs, 25 ft, warm white, SPT1 green wire | A string that works all year | 8.0/ 10 | $49.99Amazon #ad · Price as of October 26, 2026 · Disclosure |
| 4 |  C7 LED vintage Christmas lights, 25 ft, 25 shatterproof multicolor strawberry bulbs25 ft, 25 shatterproof multicolor LEDs, 11.6 in spacing, end connector | Multicolor, shatterproof | 7.3/ 10 | $17.99Amazon #ad · Price as of October 26, 2026 · Disclosure |
| 5 |  GOOTHY C7 incandescent lights, 25 ft, 25 clear warm white bulbsIncandescent, not LED — 25 bulbs over 25 ftSkip this | Skip | 6.3/ 10 | $19.99Amazon #ad · Price as of October 26, 2026 · Disclosure |
Scores are our own weighting of published manufacturer specifications, explained in full on how we research. They are not test results. We have not tested these products.
The picks in full
#1 — A commercial-grade C7 roofline
Wintergreen Lighting C7 OptiCore LED, 25 bulbs, 25 ft, cool white, green wire
25 C7 OptiCore bulbs, 12 in spacing, 0.8 W each, IP67, 480 W run limit
9.8
/ 10
The pick. The most completely specified C7 string here, from a commercial lighting brand.
Published specifications
- Bulbs
- 25 C7 OptiCore LEDs, cool white, steady
- Length
- 25 ft, sockets 12 in apart
- Wire
- 18-gauge green, 6 in lead with fused polarized plug
- Power
- 0.8 W per bulb
- Run limit
- Up to 500 ft or 480 W end to end
- Rating
- IP67
- Rated life
- Up to 60,000 hours
- Dimmable
- Yes, with a dimmer sold separately
Our scoring
- Build
- 10 / 10
- Run length
- 10 / 10
- Light quality
- 9 / 10
- Spec completeness
- 10 / 10
Good
- Every number published: spacing, watts, run limit, rating and life
- Polycarbonate lenses, sold as 200 times stronger than glass
- Also sold in warm white, multicolor, gold and amber
Watch out
- Cool white in this listing; warm white is a separate listing
- Dimmer sold separately
#ad · Price as of October 26, 2026 · How we are funded
Specs from the Amazon listing (ASIN B076HXKGGZ), verified 2026-09-11.
#2 — The densest faceted bulb
C7 LED Christmas lights, 26 ft, 50 strawberry bulbs, warm white
50 strawberry C7 bulbs over 26 ft — 6.2 in spacing
6.3
/ 10
The density pick. Nothing in this class now publishes dimming, so buy it for the spacing and the sparkle rather than for a dimmer.
Published specifications
- Length
- 26 ft
- Bulbs
- 50 C7 strawberry (faceted), clear warm white
- Spacing
- 6.2 in (26 ft over 50 bulbs — our arithmetic)
- Use
- Indoor and outdoor, per the listing
- Dimmable
- Not stated in the listing
- Wattage
- Not stated in the listing
Our scoring
- Build
- 6 / 10
- Run length
- 7 / 10
- Light quality
- 8 / 10
- Spec completeness
- 4 / 10
Good
- Twice the bulbs of every other string here at half the spacing, which is the difference between a dotted line and a continuous one
- Faceted strawberry bulbs throw more sparkle than a smooth lens
Watch out
- No published dimming, driver or wattage, where the commercial strings here publish all three
- Brand not stated
- Twice the bulbs is twice the load per foot, and there is no published wattage to check it against
#ad · Price as of October 26, 2026 · How we are funded
Specs from the Amazon listing (ASIN B0F4DQZ5Y2), verified via the Creators API 2026-10-03. Replaces the discontinued dimmable strawberry string (B08CZRMT2H), whose published dimming, rectified driver and replaceable bulbs no live C7 listing here carries.
#3 — A string that works all year
Wintergreen Lighting C7 OptiCore LED, 25 bulbs, 25 ft, commercial, warm white
25 C7 OptiCore LEDs, 25 ft, warm white, SPT1 green wire
8.0
/ 10
Best all-year C7 in warm white: commercial construction with the run length and wire gauge on the page.
Published specifications
- Bulbs
- 25 C7 OptiCore LED, warm white
- Length
- 25 ft
- Spacing
- 12 in (25 ft over 25 bulbs — our arithmetic)
- Wire
- SPT1, 18 gauge, green
- Grade
- Commercial, heavy duty
- Wattage
- Not stated in the listing
Our scoring
- Build
- 9 / 10
- Run length
- 8 / 10
- Light quality
- 8 / 10
- Spec completeness
- 7 / 10
Good
- Publishes the run length and the wire gauge, which is what tells you how many strings can be joined
- Sold for patio and party use as well as Christmas, so it earns its storage space all year
- The same OptiCore line as the cool-white pick above, so a mixed order matches
Watch out
- Wattage per bulb not published, so the amp arithmetic has to come from the tag on the string
- The most expensive way here to light 25 ft
#ad · Price as of October 26, 2026 · How we are funded
Specs from the Amazon listing (ASIN B076HVR7DP), verified via the Creators API 2026-09-24. Replaces the discontinued Uzexon warm white C7 string (B073QLG6PW).
#4 — Multicolor, shatterproof
C7 LED vintage Christmas lights, 25 ft, 25 shatterproof multicolor strawberry bulbs
25 ft, 25 shatterproof multicolor LEDs, 11.6 in spacing, end connector
7.3
/ 10
Best multicolor: shatterproof vintage strawberries for a colorful roofline.
Published specifications
- Length
- 25 ft
- Bulbs
- 25 shatterproof LED, multicolor strawberry
- Spacing
- 11.6 in
- Connector
- 6 in lead with a female end connector
- Weather
- Waterproof
- Wattage
- Not stated in the listing
Our scoring
- Build
- 8 / 10
- Run length
- 6 / 10
- Light quality
- 8 / 10
- Spec completeness
- 7 / 10
Good
- Shatterproof bulbs — the safe choice where strings get handled or dropped
- Female end connector for linking runs
Watch out
- Multicolor only in this listing
- Wattage and run limit not published
#ad · Price as of October 26, 2026 · How we are funded
Specs from the Amazon listing (ASIN B0FLNZD9JY), verified 2026-09-11.
#5 — skip this
GOOTHY C7 incandescent lights, 25 ft, 25 clear warm white bulbs
Incandescent, not LED — 25 bulbs over 25 ft
6.3
/ 10
Our skip, and now for a clearer reason than before: it is the only incandescent string on a page about LED C7s. Buy it only if you specifically want filament light and will run one string.
Published specifications
- Bulbs
- 25 C7, clear warm white
- Length
- 25 ft
- Technology
- Incandescent
- Spacing
- 12 in (25 ft over 25 bulbs — our arithmetic)
- Weather
- Waterproof, per the listing
- Wattage per bulb
- Not stated in the listing
Our scoring
- Build
- 5 / 10
- Run length
- 7 / 10
- Light quality
- 8 / 10
- Spec completeness
- 5 / 10
Good
- The warm glow of a filament, which no LED quite matches
- Publishes its technology plainly, which is more than the set it replaces did
- Same 25 bulb, 25 ft geometry as the commercial LED strings here, so a mixed run still lines up
Watch out
- Incandescent C7 bulbs draw several watts each against a fraction of a watt for LED — on a roofline that is the difference between joining four strings and joining forty
- Filament bulbs fail individually and the glass breaks when handled cold
- No published wattage, so the circuit arithmetic has to come off the box
#ad · Price as of October 26, 2026 · How we are funded
Specs from the Amazon listing (ASIN B07HF88YLW), verified via the Creators API 2026-10-02. Replaces the discontinued Brightown C7 string (B07W726K3W), whose LED status was never stated; this listing publishes incandescent.
How we ranked these
Spec first, because on a roofline the watts and the run limit decide how many strings go on one outlet. Then build — wire and lens — then light quality and color.
| String | Bulbs | Length and spacing | Watts | Run limit | Style |
|---|---|---|---|---|---|
| Wintergreen | 25 LED | 25 ft, 12 in | 0.8 W each | 500 ft or 480 W | OptiCore, cool white |
| Strawberry, 50 bulb | 50 LED | 26 ft, 6.2 in | Not stated | Not stated | Strawberry, warm white |
| Wintergreen warm white | 25 LED | 25 ft | 12 in | SPT1, 18 AWG | OptiCore, warm white |
| Multicolor | 25 LED | 25 ft, 11.6 in | Not stated | Not stated | Strawberry, multicolor |
| GOOTHY | 25 incandescent | 25 ft | Not stated | Not stated | Clear, warm white |
Only Wintergreen publishes watts and a run limit. OptiCore is Wintergreen's name for its lens. The GOOTHY string publishes incandescent bulbs, not LED.
Source: Manufacturer listings on Amazon.com, verified September 2026.
How far a C7 run goes
The arithmetic
- Wintergreen: 25 bulbs x 0.8 W = 20 W per 25 ft string
- Run limit: 500 ft or 480 W, whichever comes first
- 500 ft / 25 ft = 20 strings; 20 x 20 W = 400 W
- 400 W / 120 V = 3.3 A
The 500 ft limit comes before the 480 W one: 20 strings end to end, 400 W, about 3.3 A. That is a whole roofline on one plug, well under the 12 A continuous limit of a 15 A circuit.
The circuit rules behind that are on how many amps your lights draw.
How many strings a roofline takes
The arithmetic
- Example: a single-story house with 60 ft of front eave (an assumption — measure yours)
- 60 / 25 = 2.4, so 3 strings
- 3 x 25 ft = 75 ft: 15 ft spare for the drop to the outlet
Three 25 ft strings cover a 60 ft eave with enough left to reach down to the outlet. Measure the eave, add the run to the outlet, and round up to whole strings.
The same method for every kind of light is on how many lights you need.
C7 or C9
C7 and C9 are named for their bulb size, and the C9 is the bigger one. On a two-story house or a long roofline seen from across the street, the C9 reads better. On a single-story eave, a porch or the frame of a window or door, seen from closer, the C7 is in scale. Every bulb type is compared on bulb types explained.
Smooth, faceted or shatterproof
The Wintergreen OptiCore bulb has a smooth polycarbonate lens, sold as 200 times stronger than glass. The strawberry bulbs on the other strings are faceted, which throws more sparkle. The 50-bulb strawberry string puts twice as many of them on a 26 ft run, 6.2 in apart rather than 12. The multicolor string is sold as shatterproof, the choice where strings get handled or dropped, and the Wintergreen warm white OptiCore is the same commercial bulb as the cool-white pick in a warmer color, and it publishes its 25 ft run and its 18 AWG wire.
Hanging C7s
C7s hang from gutter and shingle clips, one clip per socket at 12 in spacing; the clips are on light clips. Stakes for running C7s along a path are on Christmas light stakes.
Questions
›How many C7 light strings can you connect?
Only as many as the listing allows. Wintergreen’s C7 OptiCore publishes a limit of 500 ft or 480 W; at 20 W per 25 ft string, that is 20 strings. The other listings here do not publish a limit.
›What is the difference between C7 and C9 lights?
Size. C9 bulbs are larger and read better on a two-story roofline; C7s are in scale on a single-story eave, a porch or a window frame.
›How far apart are C7 bulbs?
About a foot. Wintergreen’s sockets are 12 in apart; the multicolor string’s are 11.6 in.
›Are C7 lights dimmable?
Some are. The Wintergreen string publishes dimming with a separate dimmer, and it is the only string here that publishes it.
Sources
- Wintergreen Lighting C7 OptiCore listing (ASIN B076HXKGGZ; warm white ASIN B076HVR7DP) — 25 C7 bulbs, 25 ft, sockets 12 in apart, 18-gauge green wire, fused polarized plug, 0.8 W per bulb, up to 500 ft or 480 W end to end, IP67, up to 60,000 h, polycarbonate lens, dimmable with a separate dimmer
- 50-bulb strawberry C7 listing (ASIN B0F4DQZ5Y2) — 26 ft, 50 clear strawberry C7 LED bulbs, warm white, indoor and outdoor
- Wintergreen C7 OptiCore warm white listing (ASIN B076HVR7DP) — 25 C7 OptiCore LED, warm white, 25 ft, SPT1 18 gauge green wire, commercial heavy duty
- Multicolor shatterproof C7 listing (ASIN B0FLNZD9JY) — 25 ft, 25 shatterproof LED bulbs, multicolor strawberry, 11.6 in spacing, 6 in lead with female connector, waterproof
- GOOTHY C7 listing (ASIN B07HF88YLW) — 25 ft, 25 C7 clear warm white incandescent bulbs, waterproof
- Run and roofline arithmetic — Watts x bulbs; the 80% continuous rule on a 15 A circuit; eave length is a stated assumption — our arithmetic
We have not tested these products. Every figure above comes from a published manufacturer specification or from arithmetic shown on this page, and anything a maker does not publish is printed as unavailable rather than estimated. How that works, and what we will not claim, is set out on how we research.