Main Beam (bright)

Every headlamp emitting a main-beam (bright), must be so adjusted and maintained that it shall be capable of adequately illuminating an area ahead of the motor vehicle, enabling the driver/rider to see any person, vehicle or substantial object at a distance of at least 100 metres. Remember to dip the main-beam (bright) of your vehicle for oncoming traffic, as well as when following another vehicle

Source: Rules manual §6.2