What is the minimum intensity of illumination required for emergency lighting 4 feet above the elevator car floor?

The minimum intensity of illumination required for emergency lighting in an elevator car is specifically determined by safety regulations to ensure that occupants can see and navigate safely during an emergency situation. For emergency lighting situated 4 feet above the elevator car floor, the standard requirement is set at 0.2 foot candles. This level of illumination is considered adequate to illuminate the space sufficiently for people to find exits or understand emergency instructions without causing significant glare or distraction.

This standard is based on the need to provide a safe egress route during power outages or other emergencies, where visibility may be compromised. It balances the necessity of having enough light without overwhelming brightness that could impair visibility. Other intensities specified in the choices do not meet the regulatory requirements for safe emergency lighting in this context.