Photo-luminescent escape path lights must be charged with the cabin lights on bright for how many minutes?

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Multiple Choice

Photo-luminescent escape path lights must be charged with the cabin lights on bright for how many minutes?

Explanation:
Photo-luminescent escape path lighting works by storing energy from ambient light so it can glow when power is out. To ensure a clear, usable glow during an evacuation, these markings must be charged by cabin lights on bright for a sufficient period. Fifteen minutes is the recommended duration because bright cabin lighting provides enough energy to properly excite the phosphorescent material, yielding a visible, steady glow when needed. If the charging time is too short, the afterglow may be dim or incomplete, making path markings harder to see in an emergency.

Photo-luminescent escape path lighting works by storing energy from ambient light so it can glow when power is out. To ensure a clear, usable glow during an evacuation, these markings must be charged by cabin lights on bright for a sufficient period. Fifteen minutes is the recommended duration because bright cabin lighting provides enough energy to properly excite the phosphorescent material, yielding a visible, steady glow when needed. If the charging time is too short, the afterglow may be dim or incomplete, making path markings harder to see in an emergency.

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