Which statement regarding vehicle lights during inspections is correct?

The statement that all required lamps must light on request at an inspection and during operation is correct because it emphasizes the importance of vehicle safety and compliance with regulations. Proper functioning lights are crucial for visibility and signaling, both of which are essential for safe operation on the road. During inspections conducted by authorities or during routine checks, verifying that all required lights illuminate ensures that the vehicle is safe for operation. This includes headlights, brake lights, turn signals, and other necessary lamps that enhance visibility and communication with other road users.

Another important aspect is that while parked, the operational status of lights may not be as critical, the requirement for lights to function properly is primarily directed at ensuring safety while the vehicle is in motion. Maintenance of all lighting systems is vital to prevent accidents and ensure that the vehicle is compliant with legal standards. Therefore, understanding the necessity for lights to be operational during inspections and use highlights the broader context of vehicle safety.