There are no lamps or diffusers on lighting devices
Diffusers or lamps that do not correspond to the type of lighting device are used
In both cases.✓الإجابة الصحيحة
الشرح
A lighting unit needs its specified lamp and lens to produce the correct colour, beam, and intensity. Missing components or substitutes intended for a different type of lamp can mislead traffic, so either condition prohibits operation.