What does the green power indicator on a lavatory smoke detector signify?

The green power indicator on a lavatory smoke detector signifies that the detector is functioning correctly. This indicator reassuringly shows that the device is powered and is actively monitoring for smoke, confirming it is ready to detect any potential hazards. Proper functioning is critical in aircraft lavatories, as it ensures safety by providing an early warning in the event of smoke or fire. A steady green light is a standard design feature across safety devices, signaling reliability and operational readiness, while other indicators or colors may signal issues or required actions.