This 3 position switch is a nice way to control different aspects of your hobby model project.  Called an SPDT switch, this switch has a single input and double output.

You can use the switch to turn on different lights, the center position is off. The switch can handle 0.5Amps at 50 volts.  So in other words, this switch can control up to 25 LEDs.

Here is a quick video showing how to use this switch in your projects.