How long must cabin lights be turned to bright to charge photoluminescent lights?

To effectively charge photoluminescent lights, it is required that cabin lights be turned to bright for a duration of 15 minutes. This time frame allows sufficient energy absorption by the photoluminescent materials. When exposed to bright light, these materials become charged and can then emit a safe level of illumination in low-light conditions, which is crucial during emergencies or when visibility is compromised.

Charging for less than 15 minutes may not fully activate the photoluminescent properties, leading to inadequate lighting when needed most, such as during an evacuation. Therefore, adhering to the 15-minute guideline ensures that the photoluminescent lights will function effectively when activated in a dim environment.