Under what condition will headlamp assemblies be failed during inspection?

Headlamp assemblies can be failed during inspection if they are not properly aimed. Properly aimed headlamps ensure that the light is directed correctly on the road and does not blind oncoming drivers or create visibility issues. If headlamps are misaligned, they may provide inadequate illumination or present a hazard to other road users. Inspectors are trained to check both the vertical and horizontal alignment of headlamp beams as part of the safety inspection process.

The other options relate to conditions that may not necessarily result in a failure during inspection. For example, producing light for 100 feet is a relevant measure, but it's not the primary reason for failure since the focus is on proper aiming for safe use. The functioning of the high beam indicator is also not a failure point; in fact, having this indicator working is positive. Lastly, headlamp height measurements are not typically a part of the inspection criteria unless they inherently affect visibility or safety.