What is the formula for spacing wire around a conical Christmas tree?

[Rsole]

So here's my problem.
For the past few years i have built a very large christmas tree in my front yard.
1200 lights or so... looks awesome

it is 6m high, a 2m ring at the bottom and is a constant cone shape to the top point.
To install the lights i start from the bottom and progress to the top, coiling the wire around the cone at a constant spacing
i know the length of lighting wire (its written of the packet), and would like to know the formula to calculate the spacing of wire around the cone to achieve a theoretical neat finish at the top
Rus

 

[SteamKing]

So here's my problem.
For the past few years i have built a very large christmas tree in my front yard.
1200 lights or so... looks awesome

it is 6m high, a 2m ring at the bottom and is a constant cone shape to the top point.
To install the lights i start from the bottom and progress to the top, coiling the wire around the cone at a constant spacing
i know the length of lighting wire (its written of the packet), and would like to know the formula to calculate the spacing of wire around the cone to achieve a theoretical neat finish at the top
https://www.physicsforums.com/attachments/90625

Rus

There's some kind of problem with your attachment. It can't be viewed.

 

[insightful]

For your 2m diameter base and 6m high conical tree, a good approximation in meters is: spacing = 20/(wire length).

You might want to start at the top since final adjustments at the bottom should be easier.