The invention discloses a lighting device comprising a plurality of light-emitting elements (LEEs). The lighting device is configured to control light provided by one or more light-emitting elements. The lighting device is characterized in that the lighting device comprises one or more optical couplers; the one or more optical couplers guide light from the LEEs to reflectors, and then the reflectors guide the light to an angle region. In some embodiments, the lighting device comprises at least several second reflectors reflecting light from first reflectors. In some embodiments, the lighting device comprises a light guide device guiding the light from a collector to the first reflectors. Components of the lighting device can be configured to be one lighting device providing various intensity distribution. Such lighting device can be configured to provide light for specific lighting applications, including office lighting, operating lighting, cabinet lighting, garage lighting, wall washing, stack lighting and downward lighting.