What is an important requirement for decorative lights installed on vehicles?

Decorative lights on vehicles are fun enhancements for personalization, especially during festive seasons; however, they must comply with safety regulations. An important requirement is that these lights should not obscure any required lights on the vehicle. This is crucial because required lights, such as headlights, tail lights, and turn signals, serve essential functions for road safety. If decorative lights obstruct these necessary lights, they could lead to visibility issues for both the driver and other road users, potentially causing accidents.

In essence, the primary goal of this regulation is to maintain safety on the roads. Additionally, the other options provide alternate requirements which aren’t typically mandated, focusing instead on the features of the lights, rather than safety concerns regarding visibility.