What type of switch features a pilot lamp for visibility in the dark?

An illuminated switch is designed specifically to include a pilot lamp that lights up, providing visibility in low-light conditions. This lamp serves as an indicator, helping users locate the switch in the dark, and can signify whether the circuit is active or in use. The illumination ensures functionality and ease of use, especially in areas where natural or ambient light is minimal, such as hallways or bedrooms.

In contrast, a glow switch typically refers to a switch that has a built-in glow feature, often relying on phosphorescent materials rather than an active light source. A dimmer switch, while it may or may not incorporate illumination, primarily serves the purpose of adjusting light levels rather than indicating its own status with a light. An annunciator is more focused on signaling or alerting rather than providing a visibility feature for a switch itself. Thus, the illuminated switch stands out as the clear choice for having a pilot lamp to enhance visibility in darkness.