A first controller node configured to operate within a wireless network, the first controller node comprising: a receiver configured to detect data packets that are transmitted by other nodes configured to operate within the wireless network, including a) a first data packet published to at least a first group address by a first sensor node and containing a first sensor value and b) a second data packet published to at least the first group address by a second sensor node and containing a second sensor value; and characterized by: a processor configured to: i) subscribe the first controller node to a first non-empty set of subscribed-to addresses, including the first group address, wherein the subscribed-to addresses are stored in a memory, ii) calculate calibrated illuminance values from sensor values provided by data packets that are published to the first group address, including a calibrated illuminance value of the first sensor value and a calibrated illuminance value of the second sensor value, iii) select a subset of the calibrated illuminance values to be input values to an aggregate function, wherein the processor is configured to select the subset dependent on a measure of closeness in the calibrated illuminance values to one another, and iv) generate a first control signal that is determined by the aggregate function whose input values include the subset of the calibrated illuminance values; and a lamp configured for lighting control dependent on the first control signal. a receiver configured to detect data packets that are transmitted by other nodes configured to operate within the wireless network, including a) a first data packet published to at least a first group address by a first sensor node and containing a first sensor value and b) a second data packet published to at least the first group address by a second sensor node and containing a second sensor value; and characterized by: a processor configured to: i) subscribe the first controller node to a first non-empty set of subscribed-to addresses, including the first group address, wherein the subscribed-to addresses are stored in a memory, ii) calculate calibrated illuminance values from sensor values provided by data packets that are published to the first group address, including a calibrated illuminance value of the first sensor value and a calibrated illuminance value of the second sensor value, iii) select a subset of the calibrated illuminance values to be input values to an aggregate function, wherein the processor is configured to select the subset dependent on a measure of closeness in the calibrated illuminance values to one another, and iv) generate a first control signal that is determined by the aggregate function whose input values include the subset of the calibrated illuminance values; and a lamp configured for lighting control dependent on the first control signal. i) subscribe the first controller node to a first non-empty set of subscribed-to addresses, including the first group address, wherein the subscribed-to addresses are stored in a memory, ii) calculate calibrated illuminance values from sensor values provided by data packets that are published to the first group address, including a calibrated illuminance value of the first sensor value and a calibrated illuminance value of the second sensor value, iii) select a subset of the calibrated illuminance values to be input values to an aggregate function, wherein the processor is configured to select the subset dependent on a measure of closeness in the calibrated illuminance values to one another, and iv) generate a first control signal that is determined by the aggregate function whose input values include the subset of the calibrated illuminance values; and