A lighting device using an electroluminescent material, in which color mixing and dimming can be performed by a simple method, is provided. A lighting device including a first light-emitting element and a second light-emitting element which emits light having a wavelength longer than that of light emitted from the first light-emitting element and starts to emit light at a lower voltage than the first light-emitting element, is provided. The first light-emitting element and the second light-emitting element are connected in parallel, whereby a mixed color of emission colors of the first light-emitting element and the second light-emitting element is controlled by a voltage applied to the first light-emitting element and the second light-emitting element.