The pull chains in my bare closet ceiling lights were worn out so I installed them as an easy workaround. Also, I got bonus sockets (two prongs) which are hard to find in an old house. If the product has not been modified, please note that the drag chains are thin link chains and not standard ball chains. This means you'll have to improvise to tie an extended cord or chain. Small inconveniences. The chain pulls very easily and I haven't had any electrical problems with the three built-in sockets so far.