What is the primary use of a headlight aiming device?

The primary use of a headlight aiming device is to ensure that headlights are properly aimed or aligned. This is crucial for safe driving, as improperly aligned headlights can lead to inadequate road illumination, impacting visibility for the driver and blinding oncoming traffic. Aiming devices help technicians adjust the angles of headlights according to manufacturer specifications, which optimizes their performance and ensures compliance with safety regulations.

While enhancing brightness, testing headlight voltage, and calibrating headlights may relate to headlight functionality, they do not specifically address the core purpose of aiming, which is essential for preventing glare and maximizing light distribution on the road. Proper headlight alignment is a fundamental aspect of vehicle safety inspections, ensuring that headlights effectively illuminate the roadway without endangering other drivers.