What is the main purpose of using headlights during daytime?

The main purpose of using headlights during daytime is to improve visibility and ensure that other drivers can see your vehicle. This practice enhances safety on the road by making vehicles more noticeable, particularly in conditions where visibility might be reduced, such as in bright sunlight or against a complex background. By being more visible, especially during times when glare from the sun can obscure a vehicle's appearance, drivers can help prevent accidents caused by other road users not seeing their vehicle.

Using headlights is not solely for turning, nor does it directly impact fuel consumption. While legal compliance regarding the use of headlights may be a consideration in some jurisdictions, the primary focus is on safety and visibility to other drivers on the road.