A 3 gang light switch has three separate controls on a single faceplate to operate different light circuits.
Also referred to as triple light switches, they are often installed in rooms which have three sets of lights and provides a convenient option to control each individual as required.
The advantage of a two-way switch is the ability to control a single device from two separate locations.
A convenient and apt use for them is for locations like stairways, a long corridor or a very large room.
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