The invention relates to a light measurement apparatus (34), having a light source to which a light guide apparatus (24) is connected, with the light guide apparatus (24) having a light outlet area (30) on the light output side and the light measurement apparatus (34) having a light sensor arrangement (36), and having a stop for the light guide apparatus (24) to make contact with. The light sensor arrangement (36) has at least two sensors (40a, 40b, 40c, . . . ), to which light from the light outlet area (30) can be applied.