No, it is not safe to ride a cruiser motorcycle at night without a headlight or tail light. The lights on a motorcycle serve as crucial safety features, particularly in low-light conditions or at night. They help improve visibility for both the rider and other motorists on the road. Without a headlight, you would have limited visibility of the road ahead, making it difficult to navigate safely and avoid potential hazards. Similarly, without a tail light, other drivers may not be able to see you clearly from behind, increasing the risk of accidents. It is essential to ensure that all necessary lights are functioning properly and in use before riding a motorcycle, especially during low-light or nighttime conditions.