Some other types of light switches you need to know

Three-way Switch

The only type of light switches that we know are the ones we see and buy in hardware dealers. These types of switches are known as a single-pole switch, which turns the light on and off with a single flipping of the lever up or down. However, if you are one of those who have homes with hallways or stairs that need a series of lights and needs to be controlled from multiple locations particularly from both ends of the hallway of staircase, then you probably need to have the three-way switches. Three-way switch has three terminal screws including the green grounding screw and got no “on” or “off” mark.

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