How many lights for a 7 ft Christmas tree?
A 7 ft Christmas tree takes about 700 lights at the usual 100 per foot — 7 strings of 100. A 7½ ft tree takes about 750.
How to work it out
- 7 ft × 100 per foot = 700 lights
- 700 lights ÷ 100 per string = 7 strings
Seven to seven-and-a-half feet is a typical Christmas tree height for a room with an 8 ft ceiling, and an easy one to under-light. About 700 lights is the classic figure; plenty of people go to a thousand or more.
Adjust for your project
- Strings to buy
- 7 strings
- Separate runs to plug in
- check the maximum on the box — LED strings can usually connect more
- Lights per foot of height
- 100
- LED sets list how many can be connected end to end on the box or tag. Stay under that number, and under three sets per extension cord (CPSC).
- Use lights with a UL, CSA or ETL label, check every string for broken sockets or frayed wire before it goes on, and never put electric lights on a metallic tree (CPSC).
Lights for a tree by height (style and shape as above)
| Tree height | Lights | Strings to buy |
|---|---|---|
| 3 ft | 300 lights | 3 strings |
| 4 ft | 400 lights | 4 strings |
| 5 ft | 500 lights | 5 strings |
| 6 ft | 600 lights | 6 strings |
| 6.5 ft | 650 lights | 7 strings |
| 7 ft | 700 lights | 7 strings |
| 7.5 ft | 750 lights | 8 strings |
| 8 ft | 800 lights | 8 strings |
| 9 ft | 900 lights | 9 strings |
| 10 ft | 1,000 lights | 10 strings |
| 12 ft | 1,200 lights | 12 strings |
7 ft and 7½ ft trees
| Tree | Classic (100/ft) | Bright (150/ft) | Strings of 100 (classic / bright) |
|---|---|---|---|
| 7 ft slim | 525 | 788 | 6 / 8 |
| 7 ft standard | 700 | 1,050 | 7 / 11 |
| 7 ft full | 875 | 1,313 | 9 / 14 |
| 7½ ft standard | 750 | 1,125 | 8 / 12 |
The difference between a 7 ft and a 7½ ft tree is only about 50 lights at the classic rate — half a string. The bigger jump is shape: a full, wide 7 ft tree has a lot more surface than a slim one of the same height, which is why the calculator scales by shape. Pre-lit artificial trees of this size are sold with a wide range of light counts; if you are adding lights to one, count what it already has and top up.
Safe connections on a 7 ft tree
Seven LED strings in a row are within the end-to-end limit of most LED sets, but the box is the authority. With incandescent minis, keep to CPSC’s three strings per run: seven strings means three runs. Use an indoor extension cord rated for the load, keep it out from under the rug, and keep the tree well watered if it is real.
- Real tree: check the water every day; a dry tree is a fire risk.
- Metal tree: CPSC says never to put electric lights on one.
- Bedtime: turn the lights off when you go out or to bed — a timer makes it automatic.
Smaller tree: how many lights for a 6 ft tree. Taller: how many lights for a 9 ft tree.
Different size? Use the full Christmas Tree Lights Calculator.
What you’ll need
- LED mini lights (100-light strings)Budget price
LED mini lights run cool and draw a fraction of the power of incandescent strings, so more strings can be connected end to end — follow the limit on the box.
See options on Amazon (opens in a new tab) - Outdoor plug-in timerBudget price
Turns tree and patio lights on at dusk and off at bedtime, so nobody leaves them on all night.
See options on Amazon (opens in a new tab)
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Frequently asked questions
How many lights for a 7.5 ft tree?
About 750 lights — 8 strings of 100.
How many lights for a 7 ft slim tree?
About 525 lights — 6 strings of 100.
How many C9 bulbs for a 7 ft tree?
About 350 lights — 14 strings of 25.
Other common sizes
- How many lights for a 6 ft tree — 600 lights
- How many lights for a 9 ft tree — 900 lights
Sources
- U.S. Consumer Product Safety Commission — Holiday decorating safety (CPSC 611) (opens in a new tab) — Use lights tested by an independent laboratory; no more than three standard-size sets of lights per extension cord; never put electric lights on a metallic tree.
- U.S. CPSC — Happy holidays start with safety (2025 news release) (opens in a new tab) — Never string together more than three sets of incandescent lights, and never overload outlets.
- Electrical Safety Foundation International — Top 10 holiday safety tips (opens in a new tab) — Never connect more than three strings of incandescent lights; look for UL, CSA or ETL certification labels.