The invention relates to an arrangement which comprises electrical elements which
include sensors for electromagnetic radiation such as light or X-rays or are constructed
so as to emit or change light. At least one element of the arrangement is provided
with a switching unit which evaluates the signal patterns of at least two control
inputs of the element and compares them with at least one activation pattern. The
element is activated in the case of correspondence. At least two elements of the
arrangement have at least one identical activation pattern. The control inputs
of the elements are preferably coupled to a control lead bus.
