To provide a lighting device allowing its light distribution property to be easily adjusted with light sources arranged on a flat surface.

This lighting device has a board having a conductive pattern, and a plurality of light sources mounted on the board. The plurality of light sources include first light sources and second light sources each emitting light having a half-value angle larger than those of the first light sources. The lighting device is provided with a control device for controlling power supplied to the light sources for each of the first and second light sources. This control method of the lighting device is used for controlling the power supplied to the first and second light sources for each of the first and second light sources, and characterized in that the sum of values of the power supplied to the first light sources and that of the power supplied to the second light sources is constant.