Emergency Lighting & Egress Signage.

When the mains drop during a fire or a power failure, the corridors and stairs that were obvious a minute ago become hazards. Emergency lighting exists to hold those escape routes legible — illuminating the path, the changes of level, the direction changes and the final exit doors for long enough that everyone gets out. We design to the escape-route plan rather than scattering fittings on a grid: luminaires placed at every stair, intersection, corridor and exit so the route stays above the required illuminance, and the open-area and high-risk-task lighting where the building's use demands it. The choice between self-contained self-test luminaires and a central-battery system follows from the building's size, maintenance model and how it is staffed.

Photoluminescent exit and directional signage carries the same logic into the parts of evacuation that lighting alone cannot — a charged, glowing marker that keeps working even if a luminaire near it has failed, mounted at the sightlines and heights that keep the route readable through smoke and crowding. We commission the system as a tested whole: every luminaire proven to strike on loss of mains, every battery proven to hold its rated duration, and the signage scheme checked against the actual escape routes. Self-test fittings report their own lamp and battery health, and the AMC keeps the full-duration discharge tests and signage checks on a calendar with records kept for inspection. Readiness is our deliverable; final approval rests with the AHJ/consultant, so verify with the AHJ/consultant.