How many Christmas lights do I need for a 4ft tree?
360 lights for a 4 foot artificial Christmas tree. 600 lights for a 6 foot artificial Christmas tree. 1,000+ lights for an 8 foot artificial Christmas tree.
βA good rule of thumb is 100 lights for every foot-and-a-half of tree,β according to Lowe's. But Better Homes & Gardens recommends using three 100-light sets for every foot of a tree's height. And Real Simple suggests 100 lights for every foot.
The easy rule of thumb is to use one strand of lights (100 lights) for each vertical foot of the Christmas tree.
Use this equation to learn how to wrap a tree with lights: 4'H trunk / 3" spacing = 16 x 2' circumference = 32' of lighting. 3'L branch / 3" spacing = 12 x 6" circumference = 6' of lighting per branch. Total lighted feet will be approximately 56' for the trunk and four branches.
"So an easy, general rule to remember is that for each foot of your tree, you'd want to use one strand of lights.
But you don't want to overdo it. A tree that's too cluttered with lights will be overbearing, while a tree without enough lights will seem sparse. First, evaluate whether you'll have a live tree or an artificial one.
Starting at the top of the tree, intertwine the lights on top of and under branches. Work your way down and around the tree, hanging lights in the back as well. When you reach the bottom, hide any extra lights behind the tree.
- add all of your roofline measurements, doors, windows and ridgelines.
- choose your bulb spacing β a common bulb spacing is 12 inches between bulbs so the number of required LED or incandescent bulbs will be equal to the number of feet.
Once you have identified the best approach for your space, simply measure out the design on the ground. Be sure to add two to six feet for every run to give it a natural look.
So do I. As stated above, for incandescent mini lights, it's recommended to use 100 lights per vertical foot of your tree.
How many lights do I need for a 7ft Christmas tree?
There's no exact number for the right number of patio lights. It will depend on various factors, including the size of your patio and the number/brightness of the bulbs on the string. Most people prefer to have string lights around the whole perimeter of their patio to provide enough ambient light.

Lumens calculation summary
Multiply your room square footage by the footcandle requirement. For example, a 100-square foot living room, which needs 20 footcandles, will need 2,000 lumens. A 100-square foot dining room, which needs 40 footcandles, will need 4,000 lumens 2 (see PDF and complete footcandle index).
How Many Lights Do I Need For A 7ft Tree? We recommend 15 metres of lights for a 6ft Christmas tree, but if you have space for a larger tree, for every extra foot of height simply add another 5 metres of lights. So for a 7ft tree, we would suggest using 20 metres of lights.