With a KNX / DALI lighting system each individual luminaire and switch is individually addressed allowing the entire system to be structured and modified via software. In effect this gives the building virtual wiring that can be modified easily with little to no expense.
The KNX system is highly configurable, with the inclusion of a presence /daylight sensor you can enter a room not only will the lights will come on but the sensor detects the lux level in the room and compensates the artificial light so a balance is formed to give the optimum lighting level for functionality and comfort.