Yes, motorcycle lights are required at night in California. According to the California Vehicle Code (CVC) Section 24400, motorcycles must have both a headlight and taillight illuminated during nighttime hours. The headlight must emit a white light visible from the front of the motorcycle, while the taillight must emit a red light visible from the rear. These lights are essential for enhancing the visibility of motorcycles to other motorists, improving overall safety on the road. Additionally, motorcycles are required to use their headlights during the day as well, as mandated by CVC Section 24405.