A lighting device includes: a first light source that supplies yellow fluorescent light; a second light source that supplies blue light; a light sensor that detects the light quantity of a blue component of combined light, in which the yellow fluorescent light and blue light have been combined, and the light quantity of a first color component that is contained in the yellow fluorescent light and that differs from the blue component; and a control unit that adjusts the luminance of the first and second light sources. The control unit acquires each of a first light quantity that is the light quantity of the first color component and a second light quantity that is the light quantity of the blue component in a first state in which the first light source is ON and the second light source is OFF, and acquires a third light quantity.