Hello, I have a small project, I will be ripping a closet to the studs and I want to change out a light fixture, which is currently a pull string, and add a switch. What is involved in this change? Is it just a matter of putting the switch between the electrical source and the light? I will have full access to all walls, as the studs will be exposed.

Thanks for the help.

Its a simple project. However one must know how many wires are located within the box that now houses the light pull chain fixture currently in use.

If only two wires are located within the box black and white. Along with a bare single copper wire. You do the following.

The white wire stays where its at. At no point do you ever switch this wire. It is the Neutral wire. Take another wire from the box and bring it down to the new switch location. The black wire located in the light box needs to be connected to the black wire that you just installed. That wire then connects to one side of the new switch. Then the white wire left over gets taped with a black electrical tape. This indicates that the white wire is now a HOT wire. This then connects to the other side of the switch and then on the other side of the light on its black conductor. The remaining bare copper wire gets connected to the box itself if its metal, and then to the switch. The wire in the ceiling box gets put all together there as well. Your done!

However if the light box contains many wires and is used as a junction box. Adding additional wires may put to many conductors into it. As the electrcial code has a limit on how many wires can be in each box.
Also be sure that the light your replacing within the closet is not to close to the shelf nor the walls as it will not meet new codes. But a floresent type of enclosed light can be closer and is generally safter then a bare bulb in a closet anyway.

one last note. Be sure that the power is off. And if your still in doubt get a electrial contractor to do this for you. Better safe then sorry. You also can find this simple wire diagram on the web. simply google what your looking to do.