Which type of switch allows control of lights from two different locations?

The type of switch that allows control of lights from two different locations is a 3-way switch. This switch is designed specifically for situations where you want to turn a light on or off from two different points, commonly found in hallways or staircases. It operates in pairs, meaning that one switch controls the power to the light when either switch is used.

A single-pole switch only allows for control from one location, limiting its functionality to a single point. A double-pole switch is primarily used for controlling heavier loads and does not serve the purpose of controlling lights from two locations. A dimmer switch, while it can adjust the brightness of lights, does not inherently allow for control from multiple locations unless specifically configured for that purpose.