A lighting device includes: a light source switchable between illumination modes; a human detector which detects a person in a detection area in an illumination area of the light source; an ID reader which wirelessly reads an identification stored in an RF tag in a read area corresponding to the detection area; and a controller communicably connected to the light source, the human detector, and the ID reader. The controller obtains from the human detector human detection information indicating that one or more persons are present, obtains from the ID reader one or more identifications read by the ID reader when the human detector detects the one or more persons, and applies one mode of the illumination modes to the light source based on the human detection information and one or more identifications obtained, and the light source performs illumination in the applied mode.