A lighting device (1) comprises a lamp unit (10) for emitting light, a reflector (20) for reflecting the emitted light, and a housing (30) for accommodating both the lamp unit (10) and the reflector (20). Much heat is generated by the lamp unit (10) during operation of the device (1) if the lamp unit (10) comprises a lamp operating at a high power level, such as an ultra high performance lamp, which heat needs to be dissipated to the environment of the lighting device (1). For this purpose, the lighting device (1) is provided with a heat sink (40) arranged between the reflector (20) and the housing (30), which heat sink is thermally coupled to both the reflector (20) and the housing (30). The heat sink (40) comprises metal strips (42) which surround the reflector (20).