What is the meaning of 'shape' into design? 'Incompleted Ligting' is come from this question. Shape is one of most important factor and also we percieve shape when we look at the object. Incompleted Ligting' has no fixed shape, there are only possibility to make creation as user's desire.
User can create own ligting shape with their action, and this action 'pile-up' makes own beauty and harmony. This interaction creates communication between designer and user.