How many headlights have you used?

Low beam: used when driving in the city at night
High beam: used when there are no street lights, few cars or on the highway
Turn signal: used when turning, overtaking, changing lanes, and starting from the roadside
Front fog light: used in rainy and foggy weather when the front is not clear
Rear fog light: used in rainy and foggy weather
Clearance light: used to remind other cars of the width of your vehicle, and will be turned on when you turn on the headlights.