Which of the following is essential for motorcycle operation at night?

Operating a motorcycle at night requires specific visibility features to ensure both the rider's safety and the visibility of the motorcycle to other road users. Having proper taillights and turn signals is essential because they communicate the rider's intentions to others on the road, which is particularly critical in low-light conditions. These lights help drivers of other vehicles see and understand the motorcycle's movements, reducing the risk of accidents.

While additional headlight switches, glow-in-the-dark paint, and high-beam lights can serve useful purposes, they do not encompass the essential requirements for safe nighttime motorcycle operation in the same way that a functioning taillight and turn signals do. Taillights are crucial for showing the motorcycle's presence and for indicating when the rider is slowing down or turning, making them a fundamental component of safe nighttime riding.