A vehicle lighting system includes a first detection unit that detects a moving body around a host vehicle, a first determination unit that determines whether the moving body is a target to which an alert should be sent, a projection unit that can project a first pattern, which indicates first information on the host vehicle, in a predetermined range around the target, a second determination unit that determines whether another vehicle is projecting a second pattern, which indicates second information on the other vehicle, and a control unit that controls the projection unit such that the first pattern is projected at the predetermined range around the target and the first pattern does not overlap with the second pattern or such that the first pattern is not projected, when the other vehicle is projecting the second pattern.