What requirement must vehicle lights meet during inspection?

During a vehicle inspection, it is essential that all lights are fully operational. This includes headlights, taillights, turn signals, and any other lights that are part of the vehicle's lighting system. Ensuring that all lights function properly is crucial for the safety of the vehicle on the road, providing necessary visibility for both the driver and other road users, as well as signaling intentions clearly.

Brightness or flashiness is not a requirement; instead, functionality indicates that lights must be in good working condition. While it may seem that only essential lights, like headlights, need to work, comprehensive checks are necessary to ensure overall safety and compliance with state regulations. A flickering light may not adequately serve its purpose of alerting other drivers, which takes away from the safe operation of the vehicle. Therefore, the emphasis lies on the necessity for all vehicle lights to be fully functioning during the inspection process.