黑夜时间 meaning in English

darkness hours
hour of darkness
hours of darkness

The road traffic ( traffic control ) ( amendment ) regulation 2002 ( the regulation ) stipulates that drivers of motor cycles and motor tricycles shall keep all obligatory front lamps , headlamps and rear lamps lighted at all times while driving , whereas drivers of motor vehicles other than these two classes of vehicles shall comply with the same stipulation while driving during the hours of darkness or in poor visibility conditions
《 2002年道路交通（交通管制）（修订）规例》规定，电单车及机动三轮车的驾驶者在行车时，须一直亮所有强制性前灯、大灯及后灯，而在黑夜时间或在能见度低的情况下，其他种类车辆的驾驶者亦须遵守此项规定。