Which of the following is NOT a characteristic of ornamental lamps?

Ornamental lamps are typically designed primarily for decorative purposes rather than for safety or operational functions required for vehicle operation. These lamps can include flashing or revolving designs, enhancing their visual appeal instead of serving a functional role (like signaling or illuminating a path) that would be critical for vehicle safety inspections.

The other characteristics listed highlight the nuances of ornamental lamps that distinguish them from more functional lighting. They're not mandated by regulatory tables, indicating a lack of standard placement guidelines that safety-related equipment usually has. Furthermore, since ornamental lamps do not contribute to the vehicle's essential operations, they are classified as non-essential. Therefore, the choice that states ornamental lamps are used in safety inspections is accurate in that it reflects their non-regulatory and non-safety critical status.