A lighthead for operating room service, said lighthead comprising a plurality of light sources, preferably LED elements, for generating a light field on a site to be illuminated, as well as adjustment elements for modifying features of said light field, said adjustment elements comprising a user interface for modifying features of the light field by the actions of a lighthead operator, characterized in that the user interface further comprises projection elements for projecting adjustment instructions on or around the light field. A method utilizing the lighthead for projecting adjustment instructions is presented.
