The invention provides a lighting device comprising a housing. The housing comprises visible-light sources (10) arranged to generate visible light (11), UV-lightsources (12) arranged to generate UV-light (13), a light exit window (14) positioned to allow transmission of the visible light (11), a photochromic layer (16) positioned upstream of the light exit window (14) and downstream of the visible light sources (10), the photochromic layer (16) comprising at least one area with UV-photochromic material (15), the UV-photochromic material (15) having a first color state and a second color state, and a control unit (40) connected to the UV-light sources (12) for controlling the UV-light sources (12), wherein the UV-light sources are arranged to illuminate the photochromic layer (16). The invention makes it possible to obtain dynamic light effects.