What percentage of LED tail lamp diodes may be non-working and still pass inspection?

The correct answer is that a maximum of 50% of LED tail lamp diodes may be non-working and still pass inspection. This standard is in place to ensure a minimum level of functionality and safety for vehicles on the road. When it comes to tail lamps, proper signaling and visibility are critical for the safety of the driver and other road users. Having at least half the diodes operational helps maintain adequate light output, providing sufficient signals for braking and turning, thus contributing to safer driving conditions.

The other options suggest allowing higher percentages of non-working diodes, which would compromise the effectiveness of the tail lamps and potentially create safety hazards. For instance, permitting up to 75% or even 100% of the diodes to be non-functioning would severely diminish the visibility and signaling ability of the tail lights, which is against safety regulations.