Do emergency lights automatically illuminate when the right main bus loses electrical power?

Emergency lights are designed to provide illumination in critical situations, particularly during an electrical failure. In the event that the right main bus loses electrical power, the emergency lights are engineered to automatically activate. This feature ensures that pilots and crew have immediate access to essential lighting, facilitating their ability to manage the situation safely and effectively.

The automatic activation of emergency lights enhances situational awareness, allowing for critical tasks such as executing emergency procedures or safely evacuating the aircraft to take place without delay. This design reflects a safety-oriented approach in aviation, aiming to maintain operational readiness even during power loss scenarios.

In this context, the other options may address different aspects of emergency lighting systems but do not capture the fundamental operational principle that these lights are intended to provide immediate illumination in case of power failure.