Under what conditions will the landing light turn on?

The landing light will turn on when the LDG switch is activated and the landing gear is in the down position. This is a safety feature designed to prevent the landing light from being inadvertently turned on during flight or when the aircraft is not configured for landing. By requiring both the activation of the LDG switch and the landing gear being extended, the system ensures that the light is only used under the appropriate conditions—specifically, during landing phases when illumination is most critical for safe operations.

The other options might appear plausible but do not meet the safety protocols for the operation of the landing light. For instance, having the LDG switch on without the landing gear being down would not comply with the operational standards intended to prevent unintentional light usage during flight. Similarly, automatic activation based on ambient light conditions does not apply to this aircraft's system, as the landing light functionality is specifically linked to the landing configuration. Additionally, simply having the LDG switch on does not guarantee the light will activate without the proper landing gear configuration, which is essential for optimal safety and function.