The device (10) has a LED chip (20), which is accommodated in a housing (12), that exhibits a light outlet through which light leaves the housing. A light emission direction of light radiation is changeable in a continuous manner. The light emission takes place through a window (14) with relative position that is fixed with respect to the light source. The light radiation is deflectable over a reflection surface (32), which is adjustable for the light radiation relative to the light hardening device.
