What is a one way light switch?

A one way light switch is where one switch controls one light. This is opposed to a light or lighting circuit that is controlled with two or more light switches. 

When do you use a one way light switch? 

A one way light switch is only used when there is only one light switch per light. 

As the electrical components are very similar to one way or two way light switches, we only sell two way light switches. These can just as easily be used as one way light switches. You simply just connect the L1 to the live, and leave the L2 unconnected.