VEHICULAR LAMP SYSTEM, LIGHT DISTRIBUTION CONTROL DEVICE, AND LIGHT DISTRIBUTION CONTROL METHOD

A vehicle lamp system (1) includes a first light distribution variable lamp (4) that forms a first light distribution pattern (PV1) having a first hot zone (HZ1), a second light distribution variable lamp (6) that forms a second light distribution pattern (PV2) outside the first light distribution pattern (PV1) in a width direction of a vehicle, and a light distribution controlling device (8) that controls the first light distribution variable lamp (4) and the second light distribution variable lamp (6). The light distribution controlling device (8) controls the first light distribution variable lamp (4) and the second light distribution variable lamp (6) so as to swivel the first hot zone (HZ1) within the first light distribution pattern (PV1) and to form the second light distribution pattern (PV2) outside the first light distribution pattern (PV1) where the first hot zone (HZ1) swivels to.