A lighting system includes: a plurality of luminaires; a camera which captures an image of an area illuminated by the plurality of luminaires; a sound collector including at least two microphones; and a controller which determines whether or not a sound collected by the sound collector while the plurality of luminaires are off is a sound from a predetermined direction relative to the sound collector. The controller causes at least one of the plurality of luminaires to emit light of a predetermined brightness and activates the camera when the sound collected by the sound collector is determined to be the sound from the predetermined direction, and does not cause the plurality of luminaires to emit light of the predetermined brightness or activate the camera when the sound collected by the sound collector is determined not to be the sound from the predetermined direction.