Agricultural device for coupling with a work vehicle

The attachment structure (2) has a lighting device (21) which is connected with an electronic control device. The electronic control device is provided for monitoring the lighting device. The electronic control device is provided for determining an operating condition of the attachment structure based on parameter of light signals from the lighting device. Independent claims are included for the following: (1) a method for controlling the lighting device of the agricultural attachment structure; and (2) a computer program product comprising computer readable medium storing program for controlling the lighting device of the agricultural attachment structure.