What is the minimum candela output of a strobe light in a corridor?

The minimum candela output of a strobe light in a corridor is established to ensure adequate visibility and alertness in emergency situations. A strobe light's effectiveness is measured in candela, which indicates the intensity of light emitted from the device.

The correct answer, 15 cd, aligns with recognized safety standards aimed at providing sufficient warning to occupants during emergencies, particularly in areas where individuals may be disoriented or impaired. This level of brightness is deemed adequate for strobe lights in corridors, ensuring they attract attention and facilitate a safe evacuation.

In contrast, values lower than 15 cd would not provide enough intensity to ensure the strobe light can be effectively perceived in an emergency, while higher values, although potentially visible, exceed the minimum requirement without offering additional benefit in this specific context.