The DALI DT1 'Inhibit' (or 'Rest Mode') temporarily disables an emergency luminaire during planned building maintenance, avoiding spurious tests during the intervention; the gear returns automatically to normal mode after a timeout.

Inhibit / Rest Mode is used for planned electrical maintenance with scheduled mains outages. Without it, every outage triggers the emergency luminaires, discharging their batteries ten times faster than usual and raising false alarms. Activation is either manual (by a technician) or automatic (via schedule). A safety timeout returns the gear to normal mode after N hours (typically 8 h max) to prevent forgotten inhibits, and the audit log records every inhibit event.

Never disable the inhibit timeout 'temporarily' — a forgotten manual inhibit means the emergency luminaires are silently non-compliant until next discovery, which is an insurance liability.