A dishwasher comprising a projection means having a concentration lens for concentrating a light beam coming from the light source, said concentration lens being external to the door and solidly constrained to a frame that encloses said access opening.The light beam is projected by the lens towards the exterior of the dishwasher. Downstream of the lens, the light beam extends in a substantially horizontal direction. Downstream of the lens, the light beam intersects an imaginary vertical upwards projection of an upper edge (30) of the door (3) considered in the closed position.