Description Design – perfect proportions and a functional design joint. It is not simply the size and proportions of the standpipe, luminaire head and functional modules that have been perfectly matched; the individual elements are clearly separated from each other by a specially developed design joint without visible screws at the transitions. This makes the functionality of the column »readable« and contributes to the uniquely high aesthetic appeal. IoT – into the future with plug & play. The ConStela IQ 19 can be quickly and easily equipped with IoT function modules via standardised interfaces using plug & play. This opens the way to a wide range of IoT applications via the lighting network – and thus makes the Smart City tangible today.