Emergency egress lighting shall provide lighting for a duration of __________ minutes.

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Multiple Choice

Emergency egress lighting shall provide lighting for a duration of __________ minutes.

Explanation:
Emergency egress lighting must stay illuminated long enough for people to evacuate safely after a power failure. The standard minimum is 90 minutes, which provides a reliable window for occupants to find exits, navigate stairs, and reach safety, even in larger or more complex buildings. Shorter durations like 15, 30, or 60 minutes generally don’t give enough time for a full evacuation or for responders to arrive, so they aren’t considered adequate in most codes and exam standards.

Emergency egress lighting must stay illuminated long enough for people to evacuate safely after a power failure. The standard minimum is 90 minutes, which provides a reliable window for occupants to find exits, navigate stairs, and reach safety, even in larger or more complex buildings. Shorter durations like 15, 30, or 60 minutes generally don’t give enough time for a full evacuation or for responders to arrive, so they aren’t considered adequate in most codes and exam standards.

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