What constitutes a light failure during inspection?

A light failure during inspection is primarily determined by the functionality and proper alignment of vehicle lights. Non-functioning or improperly aimed headlights, taillights, or indicators directly affect the vehicle's visibility and safety on the road. This encompasses situations where lights are completely inoperative, meaning they do not illuminate at all, or when they are misaligned, causing inadequate illumination of the roadway or incorrect signaling to other drivers. Properly aimed lights ensure that they provide maximum visibility without blinding other drivers, which is crucial for safe driving.

Other options address related issues but do not fully capture the comprehensive nature of what constitutes a light failure. For instance, improperly aimed bright headlights can contribute to visibility problems but only address part of the picture. Lights that flicker may indicate an electrical issue, but they might still function at times. Similarly, lights that are too dim for visibility can be problematic; however, unless they are classified as non-functioning or improperly aimed, they do not meet the strict criteria for a light failure as defined in inspections. Hence, the most accurate choice reflects both non-functionality and improper aim.