Final answer:
Yes, it is true that when driving at night, using only the parking lights is unlawful. Headlights provide the necessary visibility for safe driving and comply with legal standards.
Step-by-step explanation:
It is true that when driving at night, it is unlawful to use only the parking lights. Most jurisdictions require the use of headlights during nighttime driving to ensure visibility and safety on the road. Using only parking lights can significantly reduce your visibility to other drivers, and does not provide sufficient illumination of the road ahead.
Furthermore, traffic laws typically stipulate that parking lights are to be used only when the vehicle is parked, hence their name. Therefore, it is important to use headlights to comply with legal requirements and maintain road safety.