Guide Β· Christmas Β· 5 min read

How Many Lights for a Christmas Tree? Chart by Tree Size

The quick answer: 100 mini lights per foot of tree. So a 7-foot tree needs about 700 lights (7 strands of 100). Here’s the full chart, plus slim trees, big bulbs and running costs.

Updated November 4, 2026 Β· For informational use

Christmas tree covered in warm white mini lights

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Lights by tree height

Mini lights unless noted. Round up to whole strands.
Tree heightClassic: 100/ft (strands of 100)Bright: 150/ftSlim/pencil treeC7/C9 big bulbs
2 ft200 (2 strands)30014050
3 ft300 (3 strands)45021075
4 ft400 (4 strands)600280100
4.5 ft450 (5 strands)675315113
5 ft500 (5 strands)750350125
6 ft600 (6 strands)900420150
6.5 ft650 (7 strands)975455163
7 ft700 (7 strands)1,050490175
7.5 ft750 (8 strands)1,125525188
8 ft800 (8 strands)1,200560200
9 ft900 (9 strands)1,350630225
10 ft1,000 (10 strands)1,500700250
12 ft1,200 (12 strands)1,800840300
Get the exact number for your tree. Open the christmas tree lights calculator β†’
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Slim trees, extra-full trees and big bulbs

  • Slim or pencil trees: about 70% of the standard count, e.g. 500 lights for a 7 ft slim tree.
  • Extra-full trees (wider than about 55 inches at 7 ft): add 25%.
  • C7 and C9 bulbs are larger and spaced 8–12 inches apart, so you need about a quarter as many, around 25 per foot.
  • Fairy (copper wire) lights are tiny and look sparse, so many people use 150–200 per foot.
  • Pre-lit trees usually have 50–70 lights per foot. Add a strand or two if yours looks dim.

How to put lights on a tree

  1. Plug the strands in and test them before they go on the tree.
  2. Start at the bottom near the trunk, by the outlet.
  3. Work up in sections, weaving lights in and out along each branch, not just wrapping around the outside. This gives depth.
  4. Keep the plug end of each strand reachable so you can connect the next one.
  5. Check the label for how many strands can be connected end to end.

What do tree lights cost to run?

6 hours a day for 40 days at 18Β’/kWh, about the 2026 US average.
TreeLED mini: season costIncandescent mini: season cost
6 ft (600 lights)$1.24$10.63
7 ft (700 lights)$1.45$12.40
9 ft (900 lights)$1.87$15.94

Questions

How many lights for a 7.5 ft tree?

About 750 mini lights (8 strands of 100) for a classic look, or about 1,100 for a bright look.

How many lights for a 6 ft tree?

About 600 mini lights, which is 6 strands of 100. A slim 6 ft tree needs about 420.

How many feet of lights for a 9 ft tree?

900 mini lights at the usual 4-inch spacing is roughly 300 feet of light string.

Are LED Christmas lights cheaper to run?

Yes. LED minis use roughly one-eighth of the electricity of incandescent minis and last much longer.

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