What is the small light on a vehicle?

[RuthLynn]

Vehicle small lights are position lights, also known as width indicator lights. They serve as warning lights installed at the edges of a car's roof to indicate the vehicle's width. Functions of small lights: 1. They make vehicles more easily recognizable during daytime driving; 2. When a motor vehicle turns, the small lights are activated to alert surrounding vehicles and pedestrians; 3. They provide road illumination during nighttime driving. Situations requiring small light activation: 1. Driving in fog: With low visibility in foggy conditions, turning on position lights along with fog lights enhances warning signals for other vehicles; 2. Rainy weather: During poor visibility in rainy conditions, small lights can be used alone for warning purposes; 3. Evening driving: When streetlights are absent at dusk and surrounding vehicles become indistinct, activating small lights improves visibility for other vehicles' safety.